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Superfamily APOIDEA
Family COLLETIDAE

This family differs from all other bees in that the females line their cells with a cel-
lophane-like substance. The glossa is short, usually truncate or bifid, and this wasp-Hke feature
is the primary basis for considering the Colletidae to be the most primitive family of living bees.
Although the Colletidae are found throughout much of the world, the family is especially abun-
dant and diverse in the southern hemisphere being exceptionally well represented in Australia
by a large fauna consisting chiefly of the subfamilies Colletinae (ParacoUetini), Euryglossinae
and Hylaeinae.

In North America the family is represented by four subfamilies of which the nominate tribe
of the Colletinae (Colletes) and the Hylaeinae (Hylaeus) comprise the largest assemblage of the
family in America north of Mexico. Only a single species of the ParacoUetini (Ettlonchopria
punctatissi7)ia Michener) is known to range north of Mexico into the United States (Arizona).
The other two subfamilies present in North America are the Xeromelissinae and Diphaglossinae
which occur only in the New World and are chiefly centered in the Neotropical Region.
Representatives of these subfamilies have been found as far north as southern Mexico
(Xeromelissinae) and the southern United States (Diphaglossinae).

While most of the species in America north of Mexico depend upon a comparatively wide
variety of flowers for nectar and pollen, the females of a number of species of Colletes are either
oligoleges or exhibit narrow polylectic tendencies.

Subfamily COLLETINAE

Tribe PARACOLLETINI

Genus EULONCHOPRIA Brethes

Etdonchopria Brethes, 1909. Mus. Nac Buenos Aires, An. 19: 247.

Type-species: Eulonchopria psaenythioides Brethes. Monotypic

Eulonchopria punctatissima Michener
Southern Ariz.; Mexico (Guerrero). Pollen: Unknown, but visits
flowers of Acacia and Baccharis.
Eulonchopria punctatissima Michener, 1963. Ent. Soc. Amer., Ann. 56: 847, fig. 1-2, 7-9. ♀.
6.

Tribe COLLETINI

Genus COLLETES Latreille

Colletes Latreille, 1802. Hist. Nat. Fourmis, p. 423.

Type-species: Apis succincta Linnaeus. Monotypic.
Evodia Panzer, 1806. Krit. Rev. Insektenf. Deutschlands, v. 2, p. 207.

Type-species: Apis succincta Linnaeus. Monotypic. {=Apis calendarum Panzer).
Colletes subg. Rhinocolletes Cockerell, 1910. Entomologist 43: 242.




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Type-species: Colletes nasutits Smith. Monotypic.
Colletes subg. Ptilopoda Friese, 1921. Stettin. Ent. Ztg. 82: 83.

Type-species: Colletes spiloptera Cockerell. Monotypic. (=Colletes maculipennis
Friese).
Colletes subg. Denticolletes Noskiewicz, 1936. Prace Nauk. Wydawnictwo Towarzystwa
Nauk. Lwowie (2) 3: 486.

Type-species: Colletes graeffei Alfken. Monotypic.
Colletes subg. Piincticollefes Noskiewicz, 1936. Prace Nauk. Wydawnictwo Towarzystwa
Nauk. Lwowie (2) 3: 490. Proposed without a type-species designation and therefore
invalid under article 13b of International Rules of Zoological Nomenclature.

Several of the subgenera cited in the above synonymy are doubtless valid, but as the sub-
generic groupings of Colletes have not been properly worked out they are listed as synonyms.

Some species are polytropic, others oligotropic. Several of the principally autumnal species
have small vernal broods.

Revision: Stephen, 1954. Kans. Univ. Sci. Bui. 36: 149-527, 87 figs., 8 maps (U. S. spp.).
—Mitchell, 1960. N. C. Agr. Expt. Sta. Tech. Bui. 141: 24-59, figs. 7-10 (eastern U. S. spp.).

Biology: IJurd and Linsley, 1975. Smithsn. Contrib. Zool. 193: 20-22, figs. 1-3 {Larrea visiting
spp.).

Species Group Productus

Colletes arizonensis Stephen
Ariz. mts.

Colletes arizonensis Stephen, 1954. Kans. Univ. Sci. Bui. 36: 204. cJ, 9.

Colletes cercidii Timberlake
Calif., Ariz. Pollen: Unknown, but visits flowers of Cercidium
torreyanum.
Colletes cercidii Timberlake, 1951. Wasmann Jour. Biol. 9: 198. ♂, ♀.

Colletes gilensis Cockerell
Colo., Tex., N. Mex., Ariz.; Mexico. Pollen: Unknown, but visits flowers of
Melilotus alba, Petalostemon candidus, P.flavescens, P. oligophyllus, Potentilla
thurberi, Solidago canadensis.
Colletes gilensis Cockerell, 1897. Ann. and Mag. Nat. Hist. (6) 19: 41. ♂.

Colletes perileucus Cockerell
Calif., Ariz., Tex., Mexico. Pollen: Unknown, but visits flowers of
Melilotus alba, Prosopis glandulosa.
Colletes perileucus Cockerell, 1924. Calif. Acad. Sci., Proc. (4) 12: 535. ♀.

Colletes productus Robertson
Mass., west to Wis., south to Ga. and Ala. Pollen: Unknown, but visits
flowers of Apocynum cannabinum, Batodendron, Rhus copallina, R. glabra, Xolisma
ligustrina.
Colletes producta Robertson, 1891. Amer. Ent. Soc, Trans. 18: 62. ♂.

Colletes rudis Timberlake
Calif, (near Indio). Pollen: Unknown, but visits flowers of Encelia farinosa.

Colletes rudis Timberlake, 1951. Wasmann Jour. Biol. 9: 197. ♂.

Colletes skinneri Viereck
Ariz., N. Mex.

Colletes skinneri Viereck, 1903. Amer. Ent. Soc, Trans. 29: 58. ♀, ♂.

Colletes vandykei Timberlake
Ariz. (Santa Rita Mts.).

Colletes vandykei Timberlake, 1951. Wasmann Jour. Biol. 9: 200. ♂.

Species Group Compactus

Colletes compactus
***authority mismatch
compactus Cresson. N. S. to Ga., west to Wis., Mo., Colo., and Ariz. Parasite:
Epeolus pusillus Cress., Epeolus autumnalis Robt.? Pollen: Compositae, especially
flowers of Astereae; Heliantheae; Helenieae.
Colletes compactus Cresson, 1868. Boston Soc. Nat. Hist., Proc. 12: 166. ♀, ♂.

Biology: Rau and Rau, 1916. Anim. Behavior, Jour. 6: 367. — Rau, 1922. Acad. Sci. St. Louis,
Trans. 24 (7): 37. — Rozen and Favreau, 1968. N. Y. Ent. Soc, Jour. 76: 106-111.

Colletes compactus
***authority mismatch
hesperius Swenk. B. C, and Idaho south to Calif., Ariz.; Mexico.

Colletes hesperius Swenk, 1906. Ent. News 12: 257. ♀, ♂.




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Species Group Latitarsis

Colletes latitarsis Robertson
Mich, to Fla., west to Mont., Colo., Tex., Ariz. Parasite: Epeoius

bifasciatus Cresson? Pollen: Unknown, but visits flowers of Asclepias incartiata, A.
syriaca, Campanula americana, Ceanothus americanus, Cicuta maculata, Lycopus
americanus, Medicago sativa, Melilotus alba, Passiflora iutea, Physalis lanceolata, P.
subglabrata, P. virgmiana, Polygonum hydropiperoides, Pycnanthemum flexuosum,
Solidago, Symphoricarpos occidentalis, Trifolium.
Colletes latitarsis Robertson, 1891. Amer. Ent. Soc, Trans. 18: 60. ♀, ♂.

punctipennis maurus Stephen. Tex. (Brownsville). The typical punctipennis Cresson occurs
only in Mexico.
Colletes punctipennis maurus Stephen, 1954. Kans. Univ. Sci. Bui. 36: 232, fig. 11. ♂.

Species Group Simulans

angelicus Cockerell. Calif. Ecology: Possibly produces two generations annually. Pollen:

Unknown, but visits predominantly fall blooming composites including but not restricted
to Baccharis emoryi, Gutierrezia sarothrae, Haplopappus venetus, H. venionioides,
Hemizonia paniculata. Males and females have also been taken at the flowers of an
unidentified Eriogonum.
Colletes angelicus Cockerell, 1905. South. Calif. Acad. Sci., Bui. 4: 32. ♂.

Colletes birkmanni Swenk
Kans., Okla., Tex., N. Mex. Pollen: Unknown, but visits flowers of Rhus
microphylla.
Colletes birkmanni Swenk, 1906. Ent. News 17: 259. ♀, ♂.

Colletes bryanti Timberlake
Ariz., N. Mex.

Colletes bryanti Timberlake, 1951. Wasmann Jour. Biol. 9: 208. ♂, ♀.

Colletes delodontus Viereck
N. Mex. Pollen: Unknown, but visits flowers of Rorri pa nasturtium.

Colletes delodontus Viereck, 1908. Amer. Ent. Soc, Trans. 29: 59. ♀.

Colletes eulophi Robertson
South, half of U. S., west to Colo, and Ariz. Parasite: Epeoius minimus
(Robt.). Pollen: Unknown, but visits flowers of Aster, Ceayiothus fendleri, C.
americamis, Chrysanthemum leucanthemum. Clematis, Eupatorium perfoliatum,
Melilotus, Rubus, Solidago nemoralis, Sophia obtusa.
Colletes eulophi Robertson, 1891. Amer. Ent. Soc, Trans. 18: 61. ♀, ♂.
Colletes illinoiensis Robertson, 1891. Amer. Ent. Soc, Trans. 18: 62. ♀.

Colletes fulgidus
***authority mismatch
fulgidus Swenk. B. C, Mont., Alta., S. Dak. south to Tex. and Calif. Pollen: Unknown,
but visits flowers of Aster, Baccharis emoryi, Calochortus luteus, Chaenactis sterioides,
Chrysothamnus, Clarkia, Coreopsis lanceolata, Cryptantha intermedia, Encelia
farinosa, Erigeron, Eriogonum fasciculatum, E. latifolium nudum, Eriophyllum
confertifolium, Grindelia, Gutierrezia califomica, G. sarothrae, Haplopappus
arborescens, H. parishii, H. vemonioides, Medicago sativa, Melilotus alba, Rhus
laurina, Solidago multiradiata, Sphenosciadium capitellatuvi.
Colletes fulgidus Swenk, 1904. In Viereck, Canad. Ent. 36: 95. ♀, ♂.

Taxonomy: Michener, 1953. Kans. Univ. Sci. Bui. 35: 1018, figs. 27, 30-33, 35 (larva).

Colletes fulgidus
***authority mismatch
longiplumosus Stephen. Coastal north. Calif, and San Joaquin Valley. Parasite:
Epeoius sp. A (Rozen). Pollen: Unknown, but visits flowers of Armeria califomica,
Clarkia rubicunda. Convolvulus, Eriophyllum staechadifolium, Grindelia latifolia,
Haploppapus, Layia, Solidago occidentalis.

Colletes fulgidus longiplumosus Stephen, 1954. Kans. Univ. Sci. Bui. 36: 248. ♂, ♀.

Colletes kincaidii Cockerell
N. S. south to N. C. west to B. C, Calif., Ariz. Pollen: Unknown, but visits
flowers of Chamaenerion angustifolium, Eriogonum mariifolium, E. subscaposum,
Heraclejim, Horkelia bemardina, Medicago sativa, Melilotus alba, Mentha arvensis,
Penstemon, Potentilla, Solidago califomica, S. confinis, Sphenosciadium capitellatuvi,
Symphoricarpos.

Colletes kincaidii Cockerell, 1898. Acad. Nat. Sci. Phila., Proc 50: 52. ♀, ♂.

Colletes sieverti Cockerell, 1906. Amer. Mus. Nat. Hist., Bui. 22: 424. ♂.

Colletes eulophi albertensis Cockerell, 1938. Canad. Ent. 70: 70. ♀.

Colletes stricklandi Cockerell, 1938. Canad. Ent. 70: 70. ♀.




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Colletes louisae Cockerell
Tex. west to south. Calif.; Mexico. Pollen: Polylectic, produces two

generations annually, the spring brood visits various Compositae (e.g., Baileya, Encelia,
Geraea, Lasthenia, Malacothrix) and desert shrubs including Agave, Cercidiitm and
Larrea. The autumnal brood obtains pollen exclusively from Compositae (e.g.,
Clirysofhavnius, Haplopappus, Lepidospartiim). Predator: Philanthus gibbosus (Fabr.).

Colletes louisae Cockerell, 1897. Ann. and Mag. Nat. Hist. (6) 19: 46. ♂.

Colletes tucsonensis Cockerell, 1906. Canad. Ent. 38: 163. ♂.
rufocinctus Cockerell. Minn, west to Alta., south to S. Dak., Colo., Ariz. Pollen: Polylege of
Compositae including Aster paniculatus, Grindelia squarrosa, Helianthus petiolaris,
Solidago canadensis, S. rigicia. Taraxacum vulgare.

Colletes rufocinctus Cockerell, 1929. Ann. and Mag. Nat. Hist. (10) 4: 298. ♂.

Colletes truncatus Timberlake, 1943. Amer. Mus. Nat. Hist., Bui. 81: 396. ♀.

Colletes simulans
***authority mismatch
armatus Patton. N. S. south to N. C, west to Nebr. and Alta. Pollen: Oligolege of
autumnal flowering Compositae including Aster ericoides, Baccharis, Bidens aristosa,
Eupatorium, Solidago ca^iadeyisis, S. graminifolia, S. yienwralis, S. ulmifolia, but also
visits Cicuta viaculata, Polygonum hydropiperoides for nectar. Predator: Philanthus
albopilosus Cress.

Colletes arynata Patton, 1879. Boston Soc. Nat. Hist., Proc. 20: 143. ♀, ♂.

Colletes scitula Patton, 1879. Boston Soc. Nat. Hist., Proc. 20: 144. ♂.

Colletes spinosa Robertson, 1891. Amer. Ent. Soc, Trans. 18: 60. ♀, ♂.

Biology: Evans, 1975. Ent. Soc. Amer., Ann. 68: 891 (predator).

Colletes simulans
***authority mismatch
miamiensis Mitchell. Fla. (Miami). Intergrades between Colletes s. simulans and C.
s. yniamiensis occur in Miss, and Tex. Pollen: Presumably oligolege of autumnal
flowering Compositae, but has been collected only on one occasion at flowers oi Bidens
pilosa.

Colletes simulans miamiensis Mitchell, 1951. Elisha Mitchell Sci. Soc, Jour. 67: 236. ♂.

Colletes simulans
***authority mismatch
nevadensis Swenk. B. C, Wash., Oreg., Calif., Nev., Utah. Pollen: Oligolege of
autumnal flowering Compositae including Baccharis emoryi, Chrysothamnus
vicidiflorus, Gutierrezia califomica, G. confinis, G. sarothrae, Haplopappus acradenius,
H. bemardina, H. pinifolius, H. vemonioides, Lepidospartiim squamatum, Solidago
lucida, but also visits Eriogonum and Melilotus alba for nectar.

Colletes nevadensis Swenk, 1908. Nebr. Univ., Dept. Ent. Contrib. 1: 52. ♂.

Colletes simulans
***authority mismatch
simulans Cresson. Nebr. west to B. C, Colo., Ariz. Pollen: Oligolege of autumnal
flowering Compositae including Aster, Bigelovia wrightii, Grindelia, Senecio.

Colletes simulans Cresson, 1868. Boston Soc. Nat. Hist, Proc. 12: 168. ♂.

Colletes bigeloviae Cockerell, 1897. Ann. and Mag. Nat. Hist. (6) 19: 40. ♀.

Colletes brevispinosus Viereck, 1903. Amer. Ent. Soc, Trans. 29: 62. ♀.

Colletes tegularis Swenk, 1905. Canad. Ent. 37: 304. ♀.

Colletes coloradensis Cockerell, 1933. Ent. Soc. Amer., Ann. 26: 41. ♂.

Colletes slevini Cockerell
B. C. to Wyo., south to Calif, and Ariz.; Mexico (Baja California). Pollen:
Polylectic, visiting a wide variety of flowers including Adenostoma fasciculatum, A.
sparsifolium, Amorpha fruticosa, Aster, Baccharis pilularis, Bigelovia, Ceanothus
integerrimus, C. palmeri. Chrysanthemum, Chrysothamnus pumilis, Cirsium,
Eriogonuyn elatuyn, E. eloyigatuyn, E.fasciculatuyn, E. latifolium yiuduyn, E.
pluynatella, E. subscaposuyn, E. wrightii. Euphorbia albomargiyiata, Freynoyitia

■ califomica, Gutierrezia califoryiica, G. lucida, Haplopappus pahueri, H. piyiifolius, H.
vemoyiioides, Heteroyneles arbutifolia, Lepidium virgiyiicuyn, Malvastruyn thurberi,
Melilotus, Nolina, Phacelia frigida, Rhayrnius califoryiica, Rhus trilobata, Ribes roezlii,
Solidago califoryiica, Spheyiosciadiuyn capitellatum, Stephanomeria exigua.

Colletes sleviyii Cockerell, 1925. Calif. Acad. Sci., Proc (4) 14: 185. ♀.

Colletes eriogoni Cockerell, 1939. Pan-Pacific Ent. 15: 188. ♂, ♀.

Colletes trigonatus Cockerell
Colo.

Colletes trigoyiatus Cockerell, 1933. Ent. Soc Amer., Ann. 26: 42. ♀.

Colletes utilis Cockerell
N. Mex.

Colletes utilis Cockerell, 1897. Ann. and Mag. Nat. Hist. (6) 19: 39. ♀.




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Colletes wootoni Cockerell
Tex., N. Mex., Ariz. Pollen: Polylectic, visits flowers oi Amorpha frutkosa,
Dasylirion wheeleri, Helenium autumnale, H. laciniatum, Isocoma, Larrea tridentata,
Meiilotus alba, Nolium microcarpa, Phacelia, Petalostemon flavescens, Sapindus
drummondi, Sphaeralcea laxa, Solidago occidentalis, Wislizenia refracta.

Colletes wootoni Cockerell, 1897. Ann. and Mag. Nat. Hist. (6) 19: 42. ♂.

Colletes apacheorum Timberlake, 1943. Amer. Mus. Nat. Hist., Bui. 81: 401. ♀.

Species Group Aestivalis

Colletes aestivalis Patton
Mass. south to N. C. west to Tenn., 111. Parasite: Epeolus interruptus Robt.?
Pollen: Unknown, but visits flowers oi Apocynum cannabmimt, Heracleuvi lanatum,
Heuchera americana, H. hispida, Krigia amplexicaulis, Polytaenia nuttallii, Rhus
glabra, Ribes gracile, Riibus villosus, Taenidia integerrima, Zizia aurea.
Colletes aestivalis Patton, 1879. Boston Soc. Nat. Hist, Proc. 20: 142. ♀.
Colletes heucherae Robertson, 1891. Amer. Ent. Soc, Trans. 18: 61. ♀, ♂.

Colletes andrewsi Cockerell
Nebr., Colo., Wis., S. Dak., Man. Pollen: Apparently an oligolege of
Heuchera.
Colletes Andrewsi Cockerell, 1906. Ann. and Mag. Nat. Hist. (7) 17: 311. ♀.

Species Group Robertsonii

Colletes kansensis Stephen
Kans. Pollen: Unknown, but visits flowers of Monarda punctata
occidentalis.
Colletes kansensis Stephen, 1954. Kans. Univ. Sci. Bui. 36: 297, fig. 29. ♂.

Colletes larreae Timberlake
South. Calif., Ariz. Pollen: Oligolege of Larrea tridentata; males also have
been collected at flowers of Acamptopappus sphaerocephalus, Barbarea orthoceras.
Colletes larreae Timberlake, 1951. Wasmann Jour. Biol. 9: 193. ♂, ♀.

Colletes metzi Timberlake
Colo. (Boulder).

Colletes metzi Timberlake, 1951. Wasmann Jour. Biol. 9: 192. ♂.

Colletes robertsonii Dalla Torre
111. and Miss., west to Man., Colo., and N. Mex. Pollen: Unknown, but
visits flowers of Amorpha canescens, Monarda punctata occidentalis, Petalostemon
candidus, P. purpureum, P. violaceus.
Colletes punctata Robertson, 1891. Amer. Ent. Soc, Trans. 18: 92. ♂. Preocc.
Colletes robertsonii Dalla Torre, 1896. Cat. Hym., v. 10, p. 44. N. name.
Colletes robustus Swenk, 1904. Ent. News 15: 251. ♀, ♂.
timberlake! Stephen. Cole, Wyo. Pollen: Unknown, but visits flowers of Petalostemon.

Colletes timberlakei Stephen, 1954. Kans. Univ. Sci. Bui. 36: 290, fig. 31. ♂.

Colletes turgiventris Timberlake
Calif. Pollen: Unknown, but visits flowers of Phacelia including P.
hispida.
Colletes turgiventris Timberlake, 1951. Wasmann Jour. Biol. 9: 196. ♂, ♀.

Species Group Nudus

Colletes brimleyi Mitchell
N. J., N. C, Ga., Fla. Pollen: Unknown, but visits flowers of Ilex cassine.

Colletes brimleyi Mitchell, 1951. Elisha Mitchell Sci. Soc, Jour. 67: 231, figs. 14, 15. ♀, ♂.

Colletes nudus Robertson
Ont. south to N. C. and La., west to Wis., Colo. Pollen: Unknown, but visits
flowers of Asclepias syriaca, Ceanothus, Daucus carota. Hydrangea arborescens,
Meiilotus alba, Monarda mollis, Parthe^iocissus, Pycnanthemum flexuosum, Rhus
copallina, R. glabra, Symphoricarpos orbiculatus, S. vulgaris, Verbe^ia urticifolia.
Colletes 7iudus Robertson, 1898. Acad. Sci. St. Louis, Trans. 8: 43. ♀, ♂.
Colletes Vierecki Swenk, 1905. Canad. Ent. 37: 301. ♀.
Colletes hydrophilus Cockerell, 1906. Ann. and Mag. Nat. Hist. (7) 17: 313. ♂.

Species Group Americanus

Colletes aberrans Cockerell
Mich., west to Alta., Colo., and N. Mex. Pollen: Unknown, but visits
flowers of Meiilotus, Petalostemon flavescens, P. villosum.
Colletes aberrans Cockerell, 1897. Ann. and Mag. Nat. Hist. (6) 19: 44. ♀.

Colletes albescens Cresson
Wis. and 111., west to Man., Utah, and N. Mex. Pollen: Unknown, but visits
flowers of Amorpha canescens, Petalostemon purpureum.
Colletes albescens Cresson, 1868. Boston Soc. Nat. Hist., Proc. 12: 168. ♀.




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Colletes americanus Cresson
Que., Man. and United States east of Rocky Mts. Parasite: Epeolus

pusillus Cress.? Pollen: Possibly oligolege of autumnal flowering Compositae, but has
been collected from these and wide range of other plants including Aster, Boltonia
asteroides, Chrysopsis microcepliala, E upatorinm altissimum, Gnaphalium
polycephalum, Helianthits divaricatus, Lacfiica floridana, Lespedeza virginica, Lycopus
aviericanus, Polygonum hydropiperoides, P. scayidens, Rudbeckia trilobata, Sium
cicutaefolium, Solidago. Predator: Philanthus solivagus Say.
Collefes americana Cresson, 1868. Boston Soc. Nat. Hist., Proc. 12: 167. ♀, ♂.

Colletes annae
***authority mismatch
annae Cockerell. N. Mex., Ariz. Pollen: Unknown, but visits flowers of Baccharis,
Solidago canadensis anzonica.
Colletes annae Cockerell, 1897. Ann. and Mag. Nat. Hist. (6) 19: 48. ♂.
CoUetes cnicis Cockerell, 1902. Ent. News 13: 304. ♂.
Colletes cockerelli Timberlake, 1951. Wasmann Jour. Biol. 9: 221. ♀.

Colletes annae
***authority mismatch
disseptus Timberlake. South Calif.; Mexico (Baja Calif.). Pollen: Possibly oligolege of
autumnal flowering Compositae including Conium maculatum, Lepidospartum
squavtatum, Solidago.
Colletes disseptus Timberlake, 1951. Wasmann Jour. Biol. 9: 223. ♀, ♂.

Colletes bradleyi Mitchell
N. J. (Chatsworth and Chesilhurst).

Colletes bradleyi Mitchell, 1951. Elisha Mitchell Sci. Soc, Jour. 67: 239. ♀.

Colletes gypsicolens Cockerell
B. C. to Calif., southeast to Colo, and N. Mex. Pollen: Possibly oligolege
of autumnal flowering Compositae including Aster, C hrysothamnus nauseosus,
Haplopappus vemonioides.
Colletes gypsicolens Cockerell, 1897. Ann. and Mag. Nat. Hist. (6) 19: 47. ♂.

Colletes howardi Swenk
N. C. (Southern Pines). Parasite: Epeolus kowardi Mitchell? Pollen: Unknown,
but visits Kuhnistera pinnata.
Colletes howardi Swenk, 1925. Amer. Mus. Novitates 186: 5. ♀, ♂.

Colletes laticinctus Timberlake
Nebr. west to Idaho, south to N. Mex. and Ariz. Pollen: Unknown, but
visits Gutierrezia sarothrae, Pedis papposa, Polygonum.
Colletes laticinctus Timberlake, 1951. Wasmann Jour. Biol. 9: 220. ♀.

Colletes mandibularis Smith
B. C, N. S., U. S., east of the Rocky Mts. Pollen: Unknown, but visits
flowers oi Amorpha canadensis, Amphiachyris, Berlandiera subcaulis. Cassia
fasciculata, Ceanothus, Cirsium, Erigeron quercifolius, E. ramosus, Flaveria linearis,
Heterotheca subaxillaris, Isopappus divaricatus, Medicago sativa, Melilotus alba, M.
indica, Prionopsis ciliata, Pycnayithemum flexuosum.
Colletes ma7idibularis Smith, 1853. Cat. Hym. Brit. Mus., v. 1, p. 5. ♂.
Colletes similis Robertson, 1904. Canad. Ent. 36: 276. ♀. Preocc.

Colletes simulator Michener, 1951. In Muesebeck et al., U. S. Dept. Agr., Agr. Monog. 2:
1048. N. name.

Colletes micheneri Stephen
Nebr. (Halsey).

Colletes yyiicheneH Stephen, 1954. Kans. Univ. Sci. Bui. 36: 357. ♂, ♀.

Colletes mitchelli Stephen
U. S. east of Great Plains, except New England. Pollen: Unknown, but

visits flowers oi Aster, Erigeron quercifolius, Haplopappus, Melilotus alba, Penstemon,
Solidago. It has also been collected at honey dew of Phylloxera on Quercus alba.
Colletes mitchelli Stephen, 1954. Kans. Univ. Sci. Bui. 36: 325, fig. 38. ♂, ♀.

Colletes ochraceus Swenk
Calif.; Mexico (Baja California). Pollen: Unknown, but visits flowers of
Eriogonum, Haplopappus vemonioides, Wislizenia refracta.
Colletes ochraceus Swenk, 1906. Canad. Ent. 38: 42. ♀.

Colletes saritensis Stephen
Tex. (near Sarita). Pollen: Unknown, but visits flowers o{ Dalea grisea.

Colletes saritensis Stephen, 1954. Kans. Univ. Sci. Bui. 36: 341, fig. 43. ♂, ♀.

Colletes solidaginis Swenk
Mass. to Ga., west to Minn, and Nebr. Pollen: Unknown, but visits flowers
of Solidago.
Colletes solidaginis Swenk, 1906. Canad. Ent. 38: 40. ♀, ♂.
susannae Swenk. Wis. and 111., west to Colo, and Alta. Pollen: Unknown, but visits flowers of
Helianthus, Kuhnistera purpurea, Petalostemon purpureum, P. violaceus.
Colletes susannae Swenk, 1925. Amer. Mus. Novitates 186: 1. ♀, ♂.




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Colletes tectiventris Timberlake
Calif. Pollen: Possibly an oligolege of autumnal flowering Compositae,
visiting flowers oi Eriogonum, Gutierrezia lucida and Haplopappus acradeiiius.
Colletes tectiventris Timberlake, 1951. Wasmann Jour. Biol. 9: 218. ♀, ♂.

Colletes thysanellae Mitchell
Fla., Ga., N. C, Va. Pollen: Unknown, but visits flowers of Aster,
Baccharis, Eiipatorium, Solidago, and possibly Thysanella.
Colletes thysanellae Mitchell, 1951. Elisha Mitchell Sci. Soc, Jour. 67: 238, figs. 18-20. ♀.
6.

Colletes wilmattae Cockerell
Wis., Minn., Iowa, Man., Nebr., Tex., N. Mex. Pollen: Possibly an oligolege
of Petalostemon having been collected only at the flowers of Petalostemon candidum,
P.flavescens, P. oUgophyllum.
Colletes wilmattae Cockerell, 1904. Canad. Ent. 36: 14. ♀.

Species Group Hyalinus

Colletes banksi Swenk
Mich, and N. Y. south to Fla. Pollen: Unknown, but visits flowers of

Batodendron, Ilex glabra.
Colletes banksi Swenk, 1908. Nebr. Univ., Dept. Ent. Contrib. 1: 19. ♀.
Colletes ilicis Mitchell, 1951. Elisha Mitchell Sci. Soc, Jour. 67: 234, figs. 12, 13. ♀, ♂.

Colletes distinctus Cresson
N. C, Ga., Fla. Pollen: Unknown, but visits flowers of Hypericum, Ilex

cassine, Melilotus alba.
Colletes distinctus Cresson, 1868. Boston Soc. Nat. Hist., Proc. 12: 167. ♂.
Colletes nitidus Smith, 1879. Descr. New Species Hym. Coll. Brit. Mus., p. 1. ♀, ♂.
Colletes caroli7ius Mitchell, 1951. Elisha Mitchell Sci. Soc, Jour. 67: 233. ♀.

Colletes hyalinus
***authority mismatch
gaudialis Cockerell. South. Calif. Pollen: Unknown, but visits flowers of Asclepias

eriocarpa, Baccharis emoryi, Brassica, Eriogonum latifolium, Gutierrezia sarothrae,

Haplopappus vemonioides, Heliotropium curassavicum, Hemizonia corymbosa,

Melilotus alba, M. indica, Oenothera, Solidago.
Colletes gaudialis Cockerell, 1905. South. Calif. Acad. Sci. Bui. 4: 32.
Colletes gaudialis Cockerell, 1905. South. Calif. Acad. Sci. Bui. 4: 106. Emend.
Colletes arenicola Cockerell, 1926. Ann. and Mag. Nat. Hist. (9) 18: 626. ♀.

Colletes hyalinus
***authority mismatch
hyalinus Provancher. N. S. and Maine, west to Alta., Yukon, Colo., and N. Mex.

Pollen: Unknown, but visits flowers of Achillea, Cirsium, Epilobmm, Frasera, Kalmia,

Melilotus, Rhus, Solidago. Predator: Philanthus albopilosus Cress.
Colletes hyalinus Provancher, 1888. Addit. Corr. Fauna Ent. Canada, Hym. p. 303. ♀, ♂.
Colletes spurctis Viereck, 1903. Amer. Ent. Soc, Trans. 29: 58. ♀, ♂.
Colletes fraserae Swenk, 1908. Nebr. Univ., Dept. Ent. Contrib. 1: 41. ♂.
Colletes cauponarius Cockerell, 1929. Ann. and Mag. Nat. Hist. (10) 4: 297. ♀.
Colletes nitidicaudus Cockerell, 1929. Ann. and Mag. Nat. Hist. (10) 4: 299. ♂.

Biology: Evans, 1975. Ent. Soc. Amer., Ann. 68: 891 (predator).

Colletes hyalinus
***authority mismatch
oregonensis Timberlake. Coastal Oreg. and Calif. Pollen: Unknown, but visits

flowers of Achillea borealis arenicola, Armeria califomica, Baccharis piiularis, Cakile
edentula, Erigeron glaucus, Eriogonum, Polygonum paronychimn, Potentilla, Silybum
marianum.
Colletes hyalinus oregonensis Timberlake, 1951. Wasmann Jour. Biol. 9: 211. ♀, ♂.

Colletes lutzi
***authority mismatch
interior Timberlake. Northeast. Calif., Nev., Oreg., Wash., Idaho. Pollen: Unknown, but
visits flowers of Melilotus alba.
Colletes monticola interior '^imherXake, 1951. Wasmann Jour. Biol. 9: 214. ♀, ♂.

Colletes lutzi
***authority mismatch
lutzi Timberlake. Idaho, Wyo., Utah, Colo., N. Mex. Pollen: Unknown, but visits flowers
of Chrysothamnus, Cleome serrulata, Melilotus.
Colletes lutzi Timberlake, 1943. Amer. Mus. Nat. Hist., Bui. 81: 390. ♀, ♂.

Colletes lutzi
***authority mismatch
monticola Timberlake. Calif. (Sierra Nevada Mts.). Pollen: Unknown, but visits flowers
of Allium, Aster adscendens, Castanopsis, Chrysothamnus, Hemizonia corymbosa,
Solidago elongata.
Colletes monticola monticola Timberlake, 1951. Wasmann Jour. Biol. 9: 212. ♀, ♂.
Colletes inyoensis Timberlake, 1951. Wasmann Jour. Biol. 9: 215. ♀.




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Colletes lutzi
***authority mismatch
pinorum Timberlake. South Calif. (San Bernardino and San Jacinto mts.). Pollen:
Unknown, but visits flowers o{ Asfer, Cryptantha, Eriogonum molestum var.
davidsonii, Gnaphalium thermale, Hemizovia wheeleri, Layia platyglossa.

Colletes monticola pinorum Timberlake, 1951. Wasmann Jour. Biol. 9: 215. ♀, ♂.

Colletes phaceliae Cockerell
B. C. to Man., south to Iowa, Kans., N. Mex., Ariz., Calif. Pollen:

Unknown, but visits flowers of Aster, Cleome serrulata, Epilobium spicatum, Grindelia,
Helenium lacinatum, Mahmstrum cocchieum, M. cockerelU, Melilotus alba,
Petalostemon, Phacelia, Psoralea tenuiflora, Ribes, Senecio douglasii, Solidago,
Sphenosciadimn capitellatum, Tetradymia spinosa.

Colletes phaceliae Cockerell, 1906. Ann. and Mag. Nat. Hist. (7) 17: 315. ♀.

Colletes salicicola geranii Cockerell, 1906. Canad. Ent. 38: 163. ♂.

Species Group Inaequalis

Colletes inaequalis Say
N. S. to Ga., west to Sask., Kans., Tex., Idaho and Wash. Parasite: Tricrania

sanguiuipennis Say. Pollen: Polylectic, visits flowers of Acer, Aesculus glabra sargentii.
Anemone virginiana, Arctostaphylos, Cercis canadensis, Claytonia palustris, Dendrium
buxifoliiim, Dentaria, Lomatium foeniculaceum, Prunus, Pyrus ioensis, Rhammis
utilis, Rhus aromatica, R. canadensis, Ribes, Rubus, Salix, Spiraea varihouttii, S.
thunbergi, Taraxacum, Viburnum acerifolium.

Colletes inaequalis Say, 1837. Boston Jour. Nat. Hist. 1: 391. ♀, ♂.

Colletes propinqua Cresson, 1868. Boston Soc. Nat. Hist., Proc. 12: 165. ♀.

Colletes canadensis Cresson, 1868. Boston Soc. Nat. Hist., Proc. 12: 166. ♂.

Colletes inaequalis ferrugineus Swenk, 1908. Nebr. Univ., Dept. Ent. Contrib. 1: 32. ♀, ♂.

Biology: Smith, 1898. Ent. News 9: 157 (as compactus). —Smith, 1900. N. Y. Ent. Soc, Jour.
8: 208 (as compactus). —Smith, 1901. N. Y. Ent. Soc, Jour. 9: 30 (as co^npactus). —Smith,
1901. N. Y. Ent. Soc, Jour. 9: 134. -Rau, 1922. Acad. Sci. St. Louis, Trans. 24 (7): 38.
—Rau, 1934. Acad. Sci. St. Louis, Trans. 28: 219. -Stephen, 1954. Kans. Univ. Sci. Bui. 36:
155.

Colletes thoracicus Smith
Mass. to Fla., west to Okla. and Tex. Parasite: Tricrania sa^iguinipemiis

Say. Pollen: Polylectic, visits flowers of Amelanchier, Aronia, Brassica, Ilex, Mains,

Melilotus, Padus, Prunus angustifolia, Salix, Vaccinium.
Colletes thoracica Smith, 1853. Cat. Hym. Brit. Mus., v. 1, p. 5. ♀, ♂.
Colletes rufithorax Swenk, 1906. Canad. Ent. 38: 42. ♀, ♂.
Colletes pulcher Swenk, 1906. Canad. Ent. 38: 43. ♂.

Biology: Parker and Boving, 1924. U. S. Natl. Mus., Proc. 64: 1-40. —Stephen, 1954. Kans.
Univ. Sci. Bui. 36: 156.

Colletes validus Cresson
N. B. to N. C, west to Mich. Ecology: A vernal species of wet woods and
swamplands. Pollen: Unknown, but visits flowers of Chamaedaphne calyculata,
Lencothoe racemosa, Prunus, Ribes oxyacantlioides, R. rubrum, Vaccinium, V.
corymbosum.
Colletes validus Cresson, 1868. Boston Soc Nat. Hist., Proc 12: 165. ♀, ♂.

Species Group Impunctatus

impunctatus lacustris Swenk. N. B. and N. H. west to B. C, Yukon, N. W. T., Alaska. Pollen:
Unknown, but possibly visits flowers of Gaylussacia. Typical impunctatus Nylander is
Palaearctic

Colletes lacustris Swenk, 1906. Ent. News 17: 257. ♀, ♂.

Colletes vici7ialis Graenicher, 1911. Pub. Mus. City Milwaukee, Bui. 1: 228. ♀.

Species Group Willistoni

Colletes brevicornis Robertson
United States east of Rocky Mts. Pollen: Unknown, but visits flowers
of Asclepias, Batodendron, Callirhoe involucrata, C. leiocarpa. Campanula, Crataegus,
Melilotus alba, Opuntia, Pastiuaca saliva, Psoralea onobrychis, Rubus, Specularia.

Colletes brevicornis Robertson, 1897. Acad. Sci. St. Louis, Trans. 7: 315. ♂.

Colletes opuntiae Cockerell, 1906. Ann. and Mag. Nat. Hist. (7) 17: 312. ♂, ♀.

Colletes brachyceros Graenicher, 1935. Ent. Soc. Amer., Ann. 28: 301. Preocc

Taxonomy: Robertson, 1900. Acad. Sci. St. Louis, Trans. 10: 51. ♀.




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Colletes willistoni Robertson
N. S. to Utah, south to Tex. and Fla. Pollen: Unknown, but visits flowers
of Ceanotlius americanus, Melilofus alba, Monarda punctata occidentalis, Physalis
elliottii, P. virginiana, Psoralea tenuiflora, Pycnanthemurn flexuosum, Rhus glabra,
Toxicodendron. Predator: Pliilantlius albopilosus Cress.
Colletes Willistoni Robertson, 1891. Amer. Ent. Soc, Trans. 18: 60. ♀.

Taxonomy: Robertson, 1895. Amer. Ent. Soc, Trans. 22: 116. ♂.

Biology: Evans, 1975. Ent. Soc. Amer., Ann. 68: 891 (predator).

Species Group Consors

Colletes californicus Provancher
South, and Centr. Calif. Pollen: Possibly oligolege of Phacelia,

visiting flowers of Baccharis, Cryptantha intermedia, Layia platyglossa, Nemophila
aurita, N. menziesii, Phacelia affinis, P. distans, P. tanacetifolia.
Colletes californica Provancher, 1895. Nat. Canad. 22: 189. ♀, ♂.

Colletes chamaesarachae Cockerell
Ariz., N. Mex. Pollen: Unknown, but visits flowers of
Chamaesaracha coronopus.
Colletes chamaesarachae Cockerell, 1897. Ann. and Mag. Nat. Hist. (6) 19: 49. ♀.

Colletes consors
***authority mismatch
consors Cresson. Mont., Idaho, Wyo., Colo., Calif. (Mono Basin). Pollen: Possibly

oHgolege of Hydrophyllaceae, visiting flowers of Hydrophyllum fendleri, Penste}uon
vire7is, Phacelia leucophylla, Taraxacum.
Colletes consors Cresson, 1868. Boston Soc. Nat. Hist., Proc. 12: 168. ♂.
Colletes zonatus Viereck, 1903. Amer. Ent. Soc, Trans. 29: 59. ♂.
Colletes myroni Cockerell, 1908. Entomologist 41: 293. ♀.

Colletes consors
***authority mismatch
mesocopus Swenk. N. S. to N. W. T. south to Alta., Mass., Mich., Wis. Pollen:
Unknown, but visits flowers of Geranium, Kahuia, Rubus.
Colletes mesocopus Swenk, 1907. Canad. Ent. 39: 364. ♀, ♂.

Colletes consors
***authority mismatch
pascoensis Cockerell. B. C. and Idaho, south to Calif, and Utah. Pollen: Unknown, but
visits flowers of Ne7)iophita aurita, Phacelia, Physalis, Sedum obtusatum.
Colletes pascoensis Cockerell, 1898. Acad. Nat. Sci. Phila., Proc. 50: 51. ♂, ♀.

Colletes linsleyi Timberlake
Calif. (Blythe). Pollen: Unknown, but visits flowers of the introduced
Tamarix.
Colletes linsleyi Timberlake, 1951. Wasmann Jour. Biol. 9: 205. ♀.
nigrifrons Titus. North Que. to N. W. T. and Yukon, south into mts. of northeast Calif., Ariz.,
and N. Mex. Pollen: Unknown, but visits flowers of Arenaria uuttallii, Drymocallis
fissa, Eriogonum lobbii, E. latifolium nudum, E. mariifoliuni, Linum lewisii,
Mertensia sibirica, Oxytropis, Physalis, Polemonium, Potentilla ansenana, P. fruticosa,
P. glandulosa, P. hippiaiia. Ranunculus, Spiraea densiflora.
Colletes nigrifrons Titus, 1900. Canad. Ent. 32: 304. ♀.
Colletes polemonii Cockerell, 1906. Amer. Mus. Nat. Hist., Bui. 22: 425. ♂.
Colletes florissantia Cockerell, 1906. Amer. Mus. Nat. Hist., Bui. 22: 425. ♂.

Colletes nitescens Timberlake
Calif. Pollen: Unknown, but visits flowers of Salix.
Colletes nitescens Timberlake, 1951. Wasmann Jour. Biol. 9: 187. ♂, ♀.

Colletes paniscus
***authority mismatch
mertensiae Timberlake. Calif. (Sierra Nevada and White mts.). Pollen: Unknown, but
visits flowers of Mertensia ciliata var. stomatechoides.
Colletes pa7iiscus mertensiae Timberlake, 1951. Wasmann Jour. Biol. 9: 182. ♂, ♀.

Colletes paniscus
***authority mismatch
paniscus Viereck. Mont, and Wyo. south into mts. of Ariz., and N. Mex. Pollen:

Unknown, but visits flowers of Houstonia, Iris 7Hissou7-iensis, Mertensia franciscana,
Salix.
Colletes paniscus Viereck, 1903. Amer. Ent. Soc, Trans. 29: 60. ♂.
Colletes oromontis Viereck, 1903. Amer. Ent. Soc, Trans. 29: 61. ♀.
Colletes pleuralis Swenk, 1906. Ent. News 17: 259. ♀, ♂.
Colletes grisescens Cockerell, 1930. Amer. Mus. Novitates 397: 4. ♂.

Colletes paniscus
***authority mismatch
sculleni Timberlake. Wash, to Mont., south to Utah, Wyo., and Calif. Pollen:
Unknown, but visits flowers of Mertensia.
Colletes paniscus sculleni Timberlake, 1951. Wasmann Jour. Biol. 9: 183. ♂, ♀.




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Colletes scopiventer Swenk
Tex., Ariz, and South. Calif. Pollen: Unknown, but visits flowers of
Baccharis emoryi, Brodiaea, Chamaesaracha conioides, Solanum rostratum.
Colletes scopiventer Swenk, 1908. Nebr. Univ., Dept. Ent. Contrib. 1: 46. ♀ (♂ misdet.).

Colletes sphaeralceae Timberlake
Calif., Ariz., Nev., Utah. Pollen: Apparently oligolege of
Sphaeralacea, visiting flowers of S. alata, S. ambigua, S. orcutti, S. rosacea.
Colletes sphaeralceae Timberlake, 1951. Wasmann Jour. Biol. 9: 189. ♂, ♀.

Colletes swenki Stephen
Tex., Kans. Pollen: Unknown, but visits flowers of Acacia greggii,
Chamaesaracha conioides, Coreopsis douglasii, Marrubium vulgare, Prosopis
glandulosa, Quincula lobata, Rhus microphylla.
Colletes swenki Stephen, 1954. Kans. Univ. Sci. Bui. 36: 450, fig. 68. ♀, ♂.

Colletes texanus
***authority mismatch
crawfordi Swenk. North. Tex. Pollen: Unknown, but visits flowers of Physalis.

Colletes crawfordi Swenk, 1906. Ent. News 17: 257. ♀.

Colletes texanus
***authority mismatch
texanus Cresson. South. Tex.

Colletes texana Cresson, 1872. Amer. Ent. Soc, Trans. 4: 249. ♀.

Colletes wickhami Timberlake
Kans., Tex., N. Mex., Ariz., South. Calif. Pollen: Unknown, but visits
flowers of Chrysothamnus nauseosus, Helenium lacinatum, Phacelia popei, Quincula
lobata.
Colletes wickhami Timberlake, 1943. Amer. Mus. Nat. Hist., Bui. 81: 394. ♂.

Colletes xerophilus
***authority mismatch
cismontanus Timberlake. Calif. (Hemet). Pollen: Unknown, but visits flowers of
Salix goodingii.
Colletes cismontanus Timberlake, 1951. Wasmann Jour. Biol. 9: 186. ♂, ♀.

Colletes xerophilus
***authority mismatch
sonoranus Timberlake. N. Mex. (Pecos). Pollen: Unknown, but visits flowers of
Salix.
Colletes xerophilus sonoranus Timberlake, 1951. Wasmann Jour. Biol. 9: 186. ♀.

Colletes xerophilus
***authority mismatch
xerophilus Timberlake. South. Calif, deserts. Pollen: Unknown, but visits flowers
of Salix.
Colletes xerophilus xerophilus Timberlake, 1951. Wasmann Jour. Biol. 9: 184. ♂, ♀.

Species Group Intermixtus

bulbotibialis Stephen. N. Mex. (Belen).

Colletes bulbotibialis Stephen, 1954. Kans. Univ. Sci. Bui. 36: 458, fig. 71. ♂.
intermixtus Swenk. Tex., N. Mex., Colo., Ariz., south. Calif. Pollen: Unknown, but visits

flowers of Cotoneaster integerrimum, Eriogoniim fasciculatum, Gnaphalimn beneolens,
Gutierrezia sarothrae, Haplopappus palmeri, Lippia, Physalis ixocarpa, Schinus molle,
Solayium douglasii.
Colletes intermixtus Swenk, 1905. Canad. Ent. 37: 302. ♀.
Colletes lippianim Cockerell, 1909. Canad. Ent. 41: 394. ♀.

Species Group Ciliatus

Colletes beamerorum Stephen
Tex.; Mexico (Chihuahua). Pollen: Unknown, but visits flowers of
Monarda punctata coryi.
Colletes beamerorum Stephen, 1954. Kans. Univ. Sci. Bui. 36: 465, fig. 73. ♂.

Colletes ciliatoides Stephen
Utah, Idaho. Parasite: Epeolus pusillus Cress. Pollen: Unknown, but
visits flowers of Cuscuta.
Colletes ciliatoides Stephen, 1954. Kans. Univ. Sci. Bui. 36: 463, fig. 74. ♂.

Biology: Torchio, 1965. Kans. Ent. Soc, Jour. 38: 182-187.

Colletes ciliatus Patton
Va., 111., Iowa, Nebr., Kans., Colo. Pollen: Unknown, but visits flowers of
Cuscuta, Eryngium yuccifolium.
Colletes ciliata Patton, 1979. U. S. Geol. Geog. Survey Bui. 5: 369. ♀.
Colletes speciosa Robertson, 1891. Amer. Ent. Soc, Trans. 18: 62. ♀.
Colletes brevihirtus Timberlake, 1943. Amer. Mus. Nat. Hist., Bui. 81: 395. ♂.




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Species Group Daleae

Colletes algarobiae Cockerell
Tex., N. Mex., Utah, Ariz., south Calif.; north. Mexico; deserts. Pollen:
Apparently oligolege of Prosopis including P. glajidulosa, P. pubescens, but also visits
flowers of Cercidhan torreyanum, Dalea, Eriogonum, Melilotus, Rhus.
Colletes algarobiae Cockerell, 1900. Entomologist 33: 244. ♂, ♀.

Colletes clypeonitens Swenk
South Calif., Ariz., Nev., Utah, west. Tex. Parasite: Epeoius niesillae
(CklL). Pollen: Oligolege of Larrea tridentata, but also visits flowers of Cercidium
floridum, Dalea polyadenia.
Colletes clypeonitens Swenk, 1906. Canad. Ent. 38: 39. ♀.

Colletes covilleae Timberlake
South. Calif., Ariz.; Mexico (Baja Calif.). Pollen: Apparently oligolege of
Larrea tridentata.
Colletes covilleae Timberlake, 1951. Wasmann Jour. Biol. 9: 231. ♂, ♀.

Colletes daleae Cockerell
Utah, Tex. to Calif.; Mexico (Baja Calif.). Pollen: Unknown, but visits flowers
of Dalea scopai'ia, Eriogonum fasciculatiim, E. gracilentum, Prosopis, Rhus laurina.
Colletes daleae Cockerell, 1897. Ann. and Mag. Nat. Hist. (6) 19: 43. ♂.

Colletes deserticola Timberlake
N. Mex., Ariz., Calif.; Mexico (Baja Calif.). Parasite: Epeoius pusillus
Cress. Pollen: Apparently oligolege of Prosopis, including P. glandulosa, but also visits
flowers of Melilotus indica.
Colletes deserticola Timberlake, 1951. Wasmann Jour. Biol. 9: 232. ♂, ♀.

Colletes petalostemonis Swenk
N. Dak. and Nebr. to Alta., Ariz., and Calif. Pollen: Unknown, but
visits flowers of Dalea polyadenia, Melilotus alba, Petalostemon flavescens.
Colletes petalostemonis Swenk, 1906. Canad. Ent. 38: 40. ♀, ♂.

Colletes prosopidis Cockerell
Tex., N. Mex., south. Calif.; north. Mexico; deserts. Pollen: Apparently

oligolege of Prosopis, including P. glandulosa var. torreyanum, but also visits flowers of
Melilotus indica.
Colletes prosopidis Cockerell, 1897. Ann. and Mag. Nat. Hist. (6) 19: 46. 6 ■

Colletes salicicola Cockerell
Tex. to south. Calif., deserts. Pollen: Polylege of a wide variety of plants,
including Acacia, Cercidium, Dalea, Eriogonum, Hyptis, Larrea, Prosopis, but also
visits flowers of Asclepias, Phacelia and Salix for nectar.
Colletes salicicola Cockerell, 1897. Ann. and Mag. Nat. Hist. (6) 19: 50. ♀.

Colletes solitarius Timberlake
Calif. (Inyo Co.).

Colletes solitarius Timberlake, 1951. Wasmann Jour. Biol. 9: 216. ♀.
Stephen! Timberlake. Calif. (Riverside Co.). Pollen: Oligolege of Larrea tridentata, but also
visits flowers of Cercidium floridum and Geraea canescens for nectar.
Colletes stepheni Timberlake, 1958. Pan-Pacific Ent. 34: 143. ♂, ♀.

Biology: Hurd and Powell, 1958. Pan-Pacific Ent. 34: 147-153, 1 fig. (nesting habits, male
behavior).

Species Group Aridus

Colletes aridus Stephen
Tex., N. Mex. Pollen: Unknown, but visits flowers of Phacelia popei.
Colletes aridus Stephen, 1954. Kans. Univ. Sci. Bui. 36: 494, fig. 75. ♂, ♀.

Species Group Titusensis

Colletes titusensis Mitchell
Fla. (Titusville, Tampa).

Colletes titusensis Mitchell, 1951. Elisha Mitchell Sci. Soc, Jour. 67: 237, figs. 16, 17. ♂.

Species Group Longifacies

Colletes longifacies Stephen
Fla. Pollen: Unknown, but visits flowers of Liatris laevigata.
Colletes longifacies Stephen, 1954. Kans. Univ. Sci. Bui. 36: 500. ♀.

Taxonomy: Mitchell, 1960. N. C. Agr. Expt. Sta. Tech. Bui. 141: 43.

Species Group Unassigned

Colletes platycnema Snelling
Ariz. (Huaehuca Mts.). Pollen: Unknown, but visits flowers of Acacia
angustissima.
Colletes platycnema Snelling, 1975. Los Angeles Co. Mus., Contrib. Sci. 267: 2, figs. 5-8. ♂.
9.




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Subfamily DIPHAGLOSSINAE

This is a New World group of large to very large, robust bees which occur in the tropics, sub-
tropics as well as the warm temperate regions of both North and South America.

Taxonomy: Michener, 1966. Kans. Univ. Sci. Bui. 46: 717-751, 48 figs.

Tribe CAUPOLICANINI
Genus PTILOGLOSSA Smith

Ptiloglossa Smith, 1853. Cat. Hym. Brit. Mus., v. 1, p. 7.

Type-species: Ptiloglossa ducalis Smith. Monotypic.
Ptilogiossa subg. Ptiloglossodes Moure, 1945. Arq. do Mus. Paranaense 4: 153.
Type-species: Megacilissa tarsata Friese. Orig. desig.

Ptiloglossa arizonensis Timberlake
Ariz. Pollen: Polylege of Cassia bauhinioides, Larrea tridentata,
Solanum elaeagnifolium, S. rostratum; females also visit flowers of Cucurbita
foetidissima for nectar.
Ptiloglossa arizonensis Timberlake, 1946. Pan-Pacific Ent. 22: 157. ♀.

Biology: Linsley, 1962. Pan-Pacific Ent. 38: 75-82. — Linsley and Cazier, 1970. Kans. Ent.
Soc, Jour. 43: 251-261, 3 tables. — Hurd and Linsley, 1975. Smithsn. Contrib. Zool. 193: 19
(floral relationships).

Ptiloglossa jonesi Timberlake
Ariz. Pollen: Polylege of Datura meteloides, Larrea tridentata, Solanum
elaeagnifolium, and S. rostratum.
Ptiloglossa jonesi Timberlake, 1946. Pan-Pacific Ent. 22: 158. ♀.

Biology: Linsley and Cazier, 1963. Pan-Pacific Ent. 39: 1-18. —Linsley and Cazier, 1970.
Kans. Ent. Soc, Jour. 43: 251-261, 3 tables. —Hurd and Linsley, 1975. Smithsn. Contrib.
Zool. 193: 20 (floral relationships).

Genus CAUPOLICANA Spinola

Although a few species of this genus occur in tropical America, the largest numbers of species
chiefly inhabit the warm temperate and subtropical regions of both continents. Most of the spe-
cies have been described from Chile and only two of the five recognized subgenera are known to
occur in southwestern United States.

Genus CAUPOLICANA Subgenus CAUPOLICANA Spinola

Caupolicana Spinola, 1851. In Gay, Hist. Fis. Pol. Chile, Zool., v. 6, p. 212.

Type-species: Caupolicana gayi Spinola. Desig. by Sandhouse, 1943.
Megacilissa Smith, 1853. Cat. Hym. Brit. Mus., v. 1, p. 123.

Type-species: Caiipolicana fulvicollis Spinola. Monotypic. (=Megacilissa superba
Smith).
Megalocilissa Schulz, 1906. Spolia Hym., p. 243. Emend.

Taxonomy: Michener, 1966. Kans. Univ. Sci. Bui. 46: 732-736.

Caupolicana electa (Cresson)
N. C, to Ga., northwest Fla., Ala. Pollen: Unknown, but visits flowers of
Gerard ia and Trichostema dichotemiim.
Megacilissa electa Cresson, 1878. Acad. Nat. Sci. Phila., Proc. 30: 221. ♂.

Taxonomy: Michener, 1966. Kans. Univ. Sci. Bui. 46: 736-738.

Biology: Mitchell, 1960. N. C. Agr. Expt. Sta. Tech. Bui. 141: 24 (seasonal activity and flight
period).

Caupolicana ocellata Michener
Kans., N. Mex., Ariz., Tex.; Mexico (Chihuahua). Pollen: Apparently an

oligolege of Dalea including D. lanata, D. scoparia, but visits flowers of Gaura coccinea
and Petalostemon flavescens for nectar.
Caupolicana {Caupolicana) ocellata Michener, 1966. Kans. Univ. Sci. Bui. 46: 738, figs. 12,
23-27,29. ♂, ♀.

Biology: Michener, 1966. Kans. Univ. Sci. Bui. 46: 739-740 (nest, floral relationships).




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Caupolicana yarrowi (Cresson)
Ariz., Utah (Zion Park), N. Mex., Tex.; Mexico. Pollen: Polylege of Cassia
bauhinioides, Datura yneteloides, Hofmanseggia jamesii, Lai-rea tridentata, Mentzelia
pumila, Solanum elaeagnifolium, S. rostratum, but visits other flowers including
Aloysia wrightii, Eysenhardtia polystacha, and Melilotus alba for nectar.
Megacilissa yarrowi Cresson, 1875. Rpt. Geog. Geol. Explor. and Survey west of 100th
Meridian, v. 5, p. 723. ♀.

Taxonomy: Michener, 1966. Kans. Univ. Sci. Bui. 46: 733-736, figs. 12, 13-17, 29. -Snelling,
1975. Los Angeles Co. Mus., Contrib. Sci. 267: 2 (geogr. records).

Biology: Cockerell and Porter, 1899. Ann. and Mag. Nat. Hist. (7) 4: 403. — Linsley and Hurd,
1959. Ent. News 70: 67. —Linsley, 1960. N. Y. Ent. Soc, Jour. 68: 13. —Linsley, 1962. Ent.
Soc. Amer., Ann. 55: 158-159. —Linsley and Cazier, 1963. Pan-Pacific Ent. 39: 1-18.
—Michener, 1966. Kans. Univ. Sci. Bui. 46: 734-736. —Linsley and Cazier, 1970. Kans. Ent.
Soc, Jour. 43: 251-261, 3 tables. —Hurd and Linsley, 1975. Smithsn. Contrib. Zool. 193:
18-19 (summary of habits and floral relationships).

Genus CAUPOLICANA Subgenus ZIKANAPIS Moure

Zikanapis Moure, 1945. Arq. do Mus. Paranaense, 4: 147.

Type-species: Ptiloglossa zikani Friese. Orig. desig.
Foersterapis Moure, 1964. Studia Ent. 7: 441.

Type-species: Zikanapis foersteri Moure and Seabra. Orig. desig.

Taxonomy: Michener, 1966. Kans. Univ. Sci. Bui. 46: 727-728, figs. 12, 30-34, 47.

Caupolicana elegans Timberlake
Ariz. (Portal); Mexico (Tehuacan and Puebla). Pollen: Unknown, but visits
flowers of Salvia.
Caupolicana elegans Timberlake, 1965. N. Y. Ent. Soc, Jour. 73: 46. ♂.

Taxonomy: Michener, 1966. Kans. Univ. Sci. Bui. 46: 743-745, fig. 47.

NoMEN Nudum in Caupolicana Spinola

Megacilissa monticola Ashmead, 1889. hi Cockerell, Colo. Biol. Assn. 10th Rpt., [p. 2J.
Probably published originally in Custer County Courant newspaper.

Subfamily HYLAEINAE

The females of this subfamily, like those of the Australian subfamily Euryglossinae and most
of those in the chiefly Neotropical subfamily Xeromelissinae, lack scopal hairs and transport pol-
len in the crop. The subfamily Hylaeinae is represented in North America only by the genus
Hylaeus. The species of this genus make cells of a transparent cellophane-like material in preex-
isting burrows, hollow stems, holes or cavities.

Revision: Mitchell, 1960. N. C. Agr. Expt. Sta. Tech. Bui. 141: 60-85 (spp. of eastern U. S.).

Taxonomy: Lovell, 1910. Psyche 17: 177 (Maine). — Metz, 1911. Amer. Ent. Soc, Trans. 37: 85
(spp.). —Meade-Waldo, 1923. Gen. Ins., v. 181, p. 29 (cat.). —Cockerell and Sumner, 1931.
Amer. Mus. Novitates 490: 14 (Rocky Mt. females). —Michener, 1942. N. Y. Ent. Soc,
Jour. 50: 273 (subgenera). -Snelling, 1966. South. Calif. Acad. Sci., Bui. 65: 164-175
(Nearctic subgenera). — Warncke, 1970. Rech. Agron. Gembloux, Bui. 5 (n.s.): 745-747
(status of generic names Hylaeus and Prosopis).

Genus HYLAEUS Fabricius

Genus HYLAEUS Subgenus PROSOPIS Fabricius

Prosopis Fabricius, 1804. Syst. Piezatorum, p. 293.

Type-species: Mellinus bipimctatus Fabricius. Desig. by Morice and Durant, 1914.
(=Sphex signata Panzer).
Prosapis Ashmead, 1894. Psyche 7: 43. Emend.

Revision: Snelling, 1966. Los Angeles Co. Mus., Contrib. Sci. 98: 1-18 (spp. of western U. S.).

Hylaeus aenigmus (Viereck)
N. Mex. Possibly a synonym of H. episcopalis (Cockerell).
Prosopis aenigmus Viereck, 1903. Amer. Ent. Soc, Trans. 29: 64. ♂.




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Hylaeus affinis (Smith)
New England and adjacent Canada west to B. C, Wash., Idaho, south to Utah,
Kans., Miss., and Ga. Pollen: Unknown, but visits a wide variety of flowers including
Amorpha, Apocynum, Arunciis, Ascelpias, Blephilia, Boltonia, Campanula, Ceanothus,
Cephalanthus, Cicuta, Clematis, Cornus, Crataegus, Cryptotaenia, Daucus carotus,
Erigeron, Eryngium, Eulophus, Eupatorium, Euphorbia, Fragaria, Geranium, Geum,
Gnaphalium, Heracleum, Houstonia. Hydrangea, Hypericum, Krigia, Lactuca,Lepidium,
Lycopus, Malva, Melilotus, Nelmnbo, Osmorrhiza, Oxypolis, Pastinaca, Petalostemon,
Philadelphicus, Polygonum, Polytaenia, Potentilla, Ptelea, Pycnanthemum,
Pyracantha, Rhus, Rubus, Salix, Salvia, Sanicula, Si2im, Solidago, Stellaria,
Stenanthium Symphoricarpos, Taenidia, Thaspium, Valerianella, Veronica, Viburnum,
Zizia. Predator: Philanthns crabroniformis Sm., P. politus Say.

Prosopis affinis Smith, 1853. Cat. Hym. Brit. Mus., v. 1, p. 24. ♀ (♂ misdet.).

Prosopis ziziae Robertson, 1896. Canad. Ent. 28: 136. ♀, ♂.

Prosopis ziziae dunningi Cockerell, 1898. Entomologist 31: 188. ♂.

Hylaeus albertensis Cockerell, 1937. Canad. Ent. 69: 126.
Taxonomy: Snelling, 1966. Los Angeles Co. Mus., Contrib. Sci. 98: 3.

Hylaeus confluens (Smith)
N. J. to Fla. Pollen: Unknown, but visits flowers of Chrysantkeimim,
Chrysopsis, Erigeron, Eryngium, Hypericum, Ilex, Ilea, Melilotus, Oxydendrum,
Oxypolis filiformis, Polygoyium, Rhus, Solidago.

Prosopis confluens Smith, 1853. Cat. Hym. Brit. Mus., v. 1, p. 24. ♀.

Prosapis triangularis Cockerell, 1896. Psyche 7 (sup.): 31. ♂.

Hylaeus episcopalis
***authority mismatch
coquilletti (Cockerell). Oreg. and Idaho south to Mexico (Baja California and

Sonora) east to Texas. Pollen: Unknown, but visits flowers of Acamptopappus, Agave
deserti, Asclepias subulata. Aster abatus, Baileya ple7iiradiata, Chamaebatiaria
millefolium Croton califomicus, Dalea califomica, D.fremontii, D. saundersii, D.
schottii. Datura meteloides Eriodictyon califomicum, Eriogonum fasciculatum, E.
inflatum, Gilia davyi, Haplopappus cooperi, Hyptis emoryi, Isomeris arborea, Larrea
tridentata, Lepidiuvi fremontii, Lupinus formosus, Melilotus alba, Peucephyllum
schottii,_Prosopis juliflora glandulosa, Sphaeralcea orcuttii, Stanleya pinnata, Tamarix
gallica.

Prosapis coquilletti Cockerell, 1896. Psyche 7 (sup.): 439. ♂.

Taxonomy: Snelling, 1966. Los Angeles Co. Mus., Contrib. Sci. 98: 10 (as H. rugulosus
episcopalis). —Snelling, 1975. Los Angeles Co. Mus., Contrib. Sci. 267: 8 (tax. status).

Hylaeus episcopalis
***authority mismatch
episcopalis (Cockerell). Alta., south to Calif, and N. Mex. Pollen: Unknown, but
visits a wide variety of flowers including Achillea lanulosa, A. millaefolium,
Adenostoma fasciculatum, Angelica tomentosa, Anthemis cotulla, Apocynum
adrosaemifolium, Asclepias fascicularis, A. mexicana, Baccharis douglasii, Calochortus
venustus, Ceanothus integerrimus, Chaetopappa aurea, Chamaebatia foiiolosa, Clarkia
bilobata, Erigeron ramosus, Eriodictyon califomicum, Eriogonum fasciculatum, E.
inflatuyn, E. latifolium nudum, E. virgatum, Eriophyllum confertiflorum, Eryngium
aristatxdum. Geranium richardsonii, Gnaphalium califomicum, Gutierrezia califomica,
G. sarothrae, Haplopappus cooperi, Heteromeles arbutifolia, Linanthus montanus,
Lupinus, Oxypolis occidentalis Penstemon breviflonis, Perideridia gairdneri, Phacelia,
Primus ilicifolia, Rhamnus califomica, Scrophularia califomica, Solidago, Stanleya
pinnata, Swertia parryi, Trichostema parishii.
Prosapis episcopalis Cockerell, 1896. Psyche 7 (sup.): 29. ♂.
Prosopis universitatis Cockerell, 1906. Ann. and Mag. Nat. Hist. (7) 17: 225. ♂.

Taxonomy: Snelling, 1966. Los Angeles Co. Mus., Contrib. Sci. 98: 9, 10 (as. H. mgulosus
rugulosus and H. r. episocpalis). —Snelling, 1975. Los Angeles Co. Mus., Contrib. Sci. 267:
8 (synonymy, tax. status).

Hylaeus episcopalis
***authority mismatch
giffardiellus Cockerell. Calif. (Sacramento and San Joaquin Valleys). Pollen:
Unknown, but visits flowers oi Melilotus alba, Raphanus sativus, Rosa califomica,
Rubus, Salix, Trifolium repens.
Hylaeus giffardiellus Cockerell, 1925. Calif. Acad. Sci., Proc. (4) 14: 186. ♂.

Taxonomy: Snelling, 1966. Los Angeles Co. Mus., Contrib. Sci. 98: 11 (as H. rugulosus
giffardiellus). —Snelling, 1975. Los Angeles Co. Mus., Contrib. Sci. 267: 8 (tax. status).




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Hylaeus episcopalis
***authority mismatch
metzi Snelling. South. Calif. Pollen: Unknown, but visits a wide variety of flowers
including Adenostoma fasciculatum, Amorpha fndicosa, Achillea millaefolium,
Apocynum androsaemifolium, Chrysopsis villosa, Cordylanthus nevinii, Encelia,
Eriogonuyn davidsonii, E. elongatum, E . fasciculatum, E . fasciculatum var. polifolium,
E. gracile, E. nudum, E. subscaposum, E. wrightii, Eriodictyon, Geranium richardsonii,
Gilia gilioides, Haplopappus cooperi, Lupinus cytisoides, Melilotus alba, Mentzelia
laevicaulis, Monardella linoides, Penstemon gri^iyiellii, P. labrosus, P. pahneri,
Phacelia ramosissima, Potentilla glandulosa, Rhamnus califomica, R. crocea. Salvia
camosa, Solidago califomica, S. confinis, Sphenosciadium capitellatum.
Hylaeus (Prosopis) rugulosus metzi Snelling, 1966. Los Angeles Co. Mus., Contrib. Sci. 98:
12. ♀, ♂.

Taxonomy: Snelling, 1975. Los Angeles Co. Mus., Contrib. Sci. 267: 8 (tax. status).

Hylaeus flammipes (Robertson)
Fla. (Citrus Co.).

Prosapis flammipes Robertson, 1893. Amer. Ent. Soc, Trans. 20: 273. ♀.

Taxonomy: Mitchell, 1960. N. C. Agr. Expt. Sta. Tech. Bui. 141: 64.

Hylaeus gaigei (Cockerell)
Mich. Possibly a synonym of H. modestus Say.

Prosopis gaigei Cockerell, 1916. Mich. Univ. Mus. ZooL, Occas. Papers 23: 2. ♀.

Taxonomy: SneUing, 1970. Los Angeles Co. Mus., Contrib. Sci. 180: 27.

Hylaeus illinoisensis (Robertson)
111. and W. Va. to N. Y., Mass., Maine. Pollen: Unknown, but visits
flowers of Apocynum cannabinum, Aruncus, Aster, Cicuta, Comus, Crataegus,
Eulophus, Gonolobus, Heracleum, Lycopus, Osmorrhiza, Pastinaca, Rhus, Salix,
Solidago, Taenidia, Thaspium, Viburnum.
Prosopis Illinoisensis Robertson, 1896. Canad. Ent. 28: 138. ♂.

Hylaeus (Prosopis) certus Mitchell, 1951. Elisha Mitchell Sci. Soc, Jour. 67: 241, figs. 4-7.

Taxonomy: Mitchell, 1960. N. C. Agr. Expt. Sta. Tech. Bui. 141: 64.

Hylaeus insolitus Snelling
Ariz., Tex.; Mexico (Chihuahua). Pollen: Unknown, but visits flowers of
Cleome serrulata.

Hylaeus (Prosopis) insolitus Snelling, 1966. Los Angeles Co. Mus., Contrib. Sci. 98: 16. ♂.
9.

Hylaeus modestus
***authority mismatch
citrinifrons (Cockerell). B. C, Alta., Mont., Wyo., Colo., N. Mex., Calif., Nev. Pollen:
Unknown, but visits a wide variety of flowers including Adenostoma fasciculatum,
Angelica arguta, A. tomentosa, Aralia califomica, Baccharis douglasii, Chaenactis
glabriuscula lanosa, Eriodictyon califomicum, Erigonum nudum., Eriophyllum
staechadifolium, Geranium dissectum, G. richardsoni, Gnaphalium califomicum,
Holodiscus discolor, Melilotus alba, Oxybaphis occidentalis, Perideridia gairdneri,
Phacelia humilis, Potentilla glandulosa, Rantt^iculus, Rhamnus califomica, Rubus,
Salvia sonomensis, Scrophularia califomica, Solidago, Sphenosciadium, capitellatum,
Trichostema parishii.

Prosapis citrinifrons Cockerell, 1896. Psyche 7 (sup.): 27. ♂.

Prosapis rugosulus Cockerell, 1896. Psyche 7 (sup.): 28. ♂.

Prosapis rugosulus var. fallax Cockerell, 1896. Psyche 7 (sup.): 28. ♂.

Taxonomy: Snelling, 1966. Los Angeles Co. Mus., Contrib. Sci. 98: 5. —Snelling, 1975. Los

Angeles Co. Mus., Contrib. Sci. 267: 7-8 (synonymy, tax. status).

Hylaeus modestus
***authority mismatch
modestus Say. East. Canada and Atlantic States to Minn., La. Parasite:

Gasteruption kirbii Westw. Pollen: Unknown, but visits a wide variety of flowers
including Acer, Achillea, Amorpha, Angelica, Apocynum, Arabis, Aralia, Aruncus,
Azalea, Cacalia, Castanea pumila, Ceanothus, Chrysanthemum, Cicuta maculata,
Comus, Crataegus, Daiicus carota, Erigeron, Eulophus, Eupatorium, Gerardia, Geum,
Heracleum, Houstonia purpurea, Hydrangea, Ilex, Koellia, Lepidium, Malva, Monarda,
Osmorrhiza, Pastinaca, Ptelea, Pycnanthemum, Pyracantha, Rhus, Rubus, Sanicula,
Siuni, Solidago, Spiraea, Symphoricarpos, Taenidia, Thaspium, Zizia. Predator:
Philanthus bilunatus Cr., P. politus Say.

Hylaeus modestus Say, 1837. Boston Jour. Nat. Hist. 4: 392. ♀ (♂ misdet.).

Prosapis pennsylvanica Cockerell, 1896. Psyche 7: 439. ♂.




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Prosopis nucleolus Viereek, 1903. Amer. Ent. Soc, Trans. 29: 64. ♀.

Prosopis sayi Robertson, 1904. Canad. Ent. 36: 274, 275. ♀, ♂.

Prosopis minyra Lovell, 1909. Ent. News 20: 413. ♂.

Prosopis binghami Lovell, 1910. Psyche 17: 180. ♂.

Prosopis supracurta Swenk and Cockerell, 1910. Ent. News 21: 71. ♂.

Biology: Rau, 1922. Acad. Sci. St. Louis, Trans. 24: 71. — Rau, 1930. Psyche 37: 173-175.
— Krombein, 1967. Trap-nesting wasps and bees, p. 262. — Medler, 1966. Ent. Soc. Wash.,
Proc. 68: 131.

Hylaeus nelumbonis (Robertson)
111. and Ohio to Fla., Ala., La. Pollen: Unknown, but visits flowers of
Castalia tuberosa, Nelumbo iutea.
Prosopis nelumbonis Robertson, 1890. Amer. Ent. Soc, Trans. 17: 316. ♀.

Taxonomy: Mitchell, 1960. N. C. Agr. Expt. Sta. Tech. Bui. 141: 67.

Hylaeus ornatus Mitchell
N. C. to Fla. Pollen: Unknown, but visits flowers of Cephalanthus,
Hypericum, Melilotus, Parthenocissns.
Hylaeus (Prosopis) ornatus Mitchell, 1951. Elisha Mitchell Sci. Soc, Jour. 67: 242, figs.
8-11. ♂, ♀.

Taxonomy: Mitchell, 1960. N. C. Agr. Expt. Sta. Tech. Bui. 141: 67.

Hylaeus schwarzii (Cockerell)
Mass. to Fla. Pollen: Unknown, but visits flowers of Hydrocotyle
umbellata, Medicago lupulina, Melilotus alba, Sagittaria, Salix.
Prosapis Schwarzii Cockerell, 1896. Ent. Monthly Mag. 32: 218. ♀.
Prosopis fossata Metz, 1911. Amer. Ent. Soc, Trans. 37: 135. ♂ (♀ misdet.).

Taxonomy: Mitchell, 1960. N. C. Agr. Expt. Sta. Tech. Bui. 141: 68.

Hylaeus transvittatus (Cockerell)
South. Ariz, (mts.); Mexico (Durango, D. F. and Veracruz).

Prosopis transvittata Cockerell, 1917. Ann. and Mag. Nat. Hist. (8) 20: 437. ♀, ♂.

Hylaeus volusiensis Mitchell
Fla. (Dade and Volusia Cos.).

Hylaeus (Prosopis) volusiensis Mitchell, 1951. Elisha Mitchell Sci. Soc, Jour. 67: 245. ♀, ♂.

Taxonomy: Mitchell, 1960. N. C. Agr. Expt. Sta. Tech. Bui. 141: 69.

Genus HYLAEUS Subgenus PARAPROSOPIS Popov

Prosopis subg. Paraprosopis Popov, 1939. Acad, des Sci. U. R. S. S., Compt. Rend. (Dok.)
(n. s.) 25: 169.

Type-species: Prosopis pictipes (Nylander). Monotypic and orig. desig.

Revision: Snelling, 1970. Los Angeles Co. Mus., Contrib. Sci. 180: 27-58, figs. 7-12 (Nearctic
species).

Species Group Asininus

asininus (Cockerell and Casad). West. Tex. to South. Calif.; Mexico (Baja California). Parasite:
Anthrax irroratus irroi-atus Say. Pollen: Unknown, but visits flowers of Baccharis
emoryi, Chrysothannius paniculatus, Gutierrezia lucida, Haplopappus acradenius,
Eriogonum fasciculatum, Lepidospartum, Prosopis, Solidago califomica.

Prosopis asininus Cockerell and Casad, 1895. Amer. Ent. Soc, Trans. 22: 299. ♂.

Prosopis bipes Cockerell and Casad, 1895. Amer. Ent. Soc, Trans. 22: 300. ♀.

Prosapis asinina var. bigeloviae Cockerell, 1898. N. Mex. Univ., Bui. 1: 72. ♀.

Biology: Krombein, 1967. Trap-nesting wasps and bees, p. 261 (nest, parasite).

Species Group Calvus

Hylaeus calvus (Metz)
South. Oreg. to Mexico (Baja California), Nev., Ariz. Pollen: Unknown, but visits
flowers of Baccharis, Ceanothus cordulatus, C. cuneatus, C. integerrimus, Collinsia
heterophylla, Eriodictyon califomicum, Eriogonum, Fremontia califomica, Holodiscus
discolor, Lepidium virginicum, Penstemon antirrhinoides, Photinia heteromeles,
Prunus ilicifolia, Rhamnus califomicus, R. crocea, Salix.
Prosopis calvus Metz, 1911. Amer. Ent. Soc, Trans. 37: 143. ♂.




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georgicus (Cockerell). N. Y., N. C, Ga., Fla., Tex. Pollen: Unknown, but visits flowers of

Crataegus, Hydrangea, Pyracantha, Salix.
Prosapis georgica Cockerell, 1898. Psyche 7 (sup.): 438. ♂.

Prosopis georgica var. leana Cockerell, 1909. Ann. and Mag. Nat. Hist. (8) 4: 27. ♂.
Hylaeus (Metziella) hydrangeae Mitchell, 1951. Elisha Mitchell Sci. Soc, Jour. 67: 244. ♀.

Hylaeus timberlakei Snelling
Calif. (Sierra Nevada Mts.). Pollen: Unknown, but visits flowers of

Ceanothus integeri'imus, Eriodictyon californicum, Eriogonum nudum, Haplopappus

arborescens, Lesshigia leptoclada, Perideridia gairdneri, Solidago califoniica.
Hylaeus (Paraprosopis) timberlakei Snelling, 1970. Los Angeles Co. Mus., Contrib. Sci.

180: 50. cJ, 9.

Species Group Megalotis

Hylaeus megalotis (Swenk and Cockerell)
Mont., Colo., Nebr., Utah, Ariz. Pollen: Unknown, but visits
flowers of Cleome serrulata, Chrysothawnus, Eriogonum aureus.
Prosopis megalotis Swenk and Cockerell, 1910. Ent. News 21: 69. ♂, ♀.

Species Group Sonorensis

Hylaeus sonorensis Cockerell
Ariz., south. Calif.; Mexico (Baja California and Sonora). Pollen:

Unknown, but visits flowers of Encelia, Eriogonuvi inflatum, Eucnide urens, Prosopis
glandulosa, Scropliularia califoniica, Stanleya pi^inata.
Hylaeus sonoretisis Cockerell, 1924. Calif. Acad. Sci., Proc. (4) 12: 530. ♀.
Hylaeus soyiorensis var. ynelanorhinus Cockerell, 1924. Calif. Acad. Sci., Proc. (4) 12: 531.
9.

Species Group Wootoni

Hylaeus coloradensis (Cockerell)
B. C, Wash., Idaho, Colo., N. Mex., Ariz., Utah, Nev., east, and south.
Calif. Pollen: Unknown, but visits flowers of Achillea lanulosa, A. niillaefolium,
Adenostoma fasciculatum, Baccharis pilularis, Barbarea orthoceras, Ceanothus
cordulatus, Chrysothamnus nauseosus, C. 7iauseosus consimilis, Descurainia sophia,
Erigeron canadensis, E. pygmaeus, Eriodictyon californicum, Eriogonum elegans, E.
lobbii, E. mariifolium, E. latifolium nudum, E. subscaposum, E. unibellatum, E.
virgatuni, Gnaphaliu^n thermale, Haplopappus arborescens, Holodiscus boursieri,
Ivesia muirii, Lasthenia chrysostoma, Lepidospartum squamatum, Mentzelia
laevicaulis, Oxypolis occideritalis, Penstemon davidsonii, P. newberryi, Potentilla
glaiidulosa, Rhatnnus califomica, Rhus, Solidago califoniica, S. multiradiata,
Sphenosciadium capitellatum.
Prosapis coloradensis Cockerell, 1896. Psyche 7 (sup.): 30. ♂.

Hylaeus cookii (Metz)
N. Mex., Nev. (Churchill Co.), Ariz., south. Calif. Pollen: Unknown, but visits
flowers of Asclepias tuberosa, Chrysothamiius steyiophyllus, Erigeron canadensis,
Eriogonum aureu7n, E. fasciculatum, E. inflatuyn, E. plumatella, Fallugia, Gutierrezia
lucida, Haplopappus gracilis, H. linearifolius, Lepidospartum, Nolina parryi,
Petalostemon candidum, Phacelia ramosissima, Prosopis, Rhus trilobata. Salvia dorii,
S. vitosa, Solidago califoniica, Sphaeralcea ambigua, Tetradymia canescens.

Prosopis cookii Metz, 1911. Amer. Ent. Soc, Trans. 37: 139. ♂ (♀ misdet.).

Hylaeus floridanus (Robertson)
Maine, Minn., Mich., 111., Ky., N. C, Ga., Fla. Pollen: Unknown, but
visits flowers of Aster, Conius paniculata, Erigeron quercifolius, Eulophus
ainericanus. Ilex, Polygonella polygama, Pyracantha, Solidago.

Prosopis floridanus Robertson, 1893. Amer. Ent. Soc, Trans. 20: 273. ♀.

Prosopis eulophi Robertson, 1905. Canad. Ent. 37: 236. ♀, ♂.

Hylaeus (Paraprosopis) packardi Mitchell, 1951. Elisha Mitchell Sci. Soc, Jour. 67: 244. ♂.

Hylaeus lunicraterius Snelling
Idaho (Craters of the Moon National Monument), Calif. Pollen:

Unknown, but visits flowers of Chamaebataiia millefolium, Chrysothamnus nauseosus,
C. viscidiflorus, Eriogonum nudum, E. ovalifolium, Phacelia leucophylla, Populus
tremuloides, Senecio serra.

Hylaeus {Paraprosopis) lunicraterius Snelling, 1970. Los Angeles Co. Mus., Contrib. Sci.
180:46. ♂, ♀.




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Hylaeus nevadensis (Cockerell)
B. C, Wash., Idaho, Oreg., Calif., Nev. Pollen: Unknown, but visits
flowers of Achillea lanulosa, Adenostojria fasciculatum, Angelica tomentosa,
Apocynum androsaemifolium, Baccharis douglasii, Ceanothus cuneatus, C.
integerrimus, C. soredatus, Centaurea melitensis, Cicuta, Collinsia, Cordylanthus
rigidus, Corethrogyne filaginifolia, Eriodictyon califomicum, E. crassifolium, E.
trichocalyx, Erigeron heterophyllus, Eriogonum latifolium nudtim, E. saxatile, E.
wrightii, Eriophyllum confertiflorum, Geranium richardsonii, Gnaphalium
califomic7im , Haplopappus arborescens, H. parishii, Holodiscus discolor, Horkelia
bemardina, Monardella linoides, M. odoratissima, Penstemon labrosus, Perideridia
gairdneri, Phacelia humilis, Potentilla glandulosa, Prunus ilicifolia, Rhamnus
califomica, R. crocea, Solidago califomica, S. occidentalis, Tetradymia canescens.

Prosapis nevadensis Cockerell, 1896. Psyche 7 (sup.): 32. ♂.

Prosopis hesperipkila Cockerell, 1910. Ann. and Mag. Nat. Hist. (8) 5: 29. ♂.

Hylaeus oregonensis Bridwell, 1919. Hawaii. Ent. Soc, Proc. 4: 160. ♀, ♂.

Hylaeus personatellus (Cockerell)
Colo. (Corona and Ouray), Calif. (Sierra Nevada Mts.). Pollen:

Unknown, but visits flowers of Aster, Brodiaea gracilis, Chrysothamnus nauseosus,
Erigeron pygmaeus, Eriogonum elatum, E. lobbii, E. mariifolium, E. nudum, E.
ovalifolium, Ivesia muiri, Monardella odoratissima, Penstemon davidsonii, P.
newberryi, Perideridia gairdneri, Potentilla glandulosa, Solidago multivadiata.

Prosopis personatellus Cockerell, 1915. Ann. and Mag. Nat. Hist. (8) 16: 485. ♀.

Hylaeus polifolii (Cockerell)
Calif. Parasite: Eurytoma stigmi Ashm. Pollen: Unknown, but visits
flowers of Achillea millaefolium, Adenostoma fasciculatum, Alyssum maritimum,
Anaphalis margaritacea, Baccharis douglasii, B. emoryi, B. glutinosa, B. pilularis, B.
viminea, Ceanothus crassifolius, C. greggii, C. integerrimus, C. leucodermis, C.
soredatus, Chrysothanmus nauseosus. Coreopsis lanceolata, Cryptantha intermedia,
Dendromecon rigida, Erigeron canadensis, E. stenophyllus, Eriodictyon trichocalyx
lanatum, Eriogonum elongatum, E . fasciculatum, E. gracile, E. latifolium, E.
latifolium nudum, E. vimineum, Eriophyllum confertiflorum, Eryngium aristatulum.
Erysimum perenne. Euphorbia albomarginata, Gnaphalium beneolens, G. califomicum,
Gutierrezia califomica, G. sarothrae, Haplopappus arborescens, H. linearifolius, H.
parishii, Helenium puberulum, Heteromeles arbutifolia, Heterotheca grandiflora,
Lasthenia, Malacothrix tenuifolia, Melilotus alba, Mentha, Opuntia, Penstemon
Tr^ antirrhinoides, Perideridia, Phacelia distans, Prunus demissa, P. ilicifolia,

Pyracantha, Rhamnus califomica, R. crocea, Rhtis diversiloba, R. laurina, R. trilobata,
Salix lasiolepis, Salvia, Sambucus caerulea, Scrophularia califomica, Sedum, Senecio
califomica, Solidago califomica, S. occidentalis, Sphenosciadium capitellatum, Swertia
parryi, Tetradymia cayiescens, Trichostema parishii.

Prosopis polifolii Cockerell, 1901. Canad. Ent. 33: 281. ♂.

Hylaeus polifolii catalinensis Cockerell, 1938. Ann. and Mag. Nat. Hist. (11) 2: 150. ♂, ♀.

Hylaeus wootoni (Cockerell)
B. C. to Calif., Ariz., N. Mex.; Mexico (Chihuahua). Pollen: Unknown, but
visits flowers of Achillea lanulosa, Apocynum androsaemifolium, Aster canescens,
Calochortus paludicola, C. splendens, Ceanothus cordulatus, C. palmeri,
Chrysothamnus nauseosus, C. pumilius, C. viridulus, C. viscidiflorus puberulus,
Eriodictyon trichocalyx, Eriogonum davidsoni, E. fasciculatum, E. nudum, E.
subscaposum, E. umbellatum, E. wrightii, E. wrightii membranaceum, Eriophyllum,
Erysimum asperum, Haplopappus arborescens, H. uniflorus gossypinus, H. parishii,
Horkelia fusca, Lepidium virginicum, Mentzelia albicaulis, Phacelia imbricata,
Potentilla glandulosa. Ranunculus californicus, Rhamnus califomicus, Solidago
califomica, S. confinis, Tetradymia canescens.

Prosapis wootoni Cockerell, 1896. Psyche 7 (sup.): 26. ♂.

Prosapis divergens Cockerell, 1896. Psyche 7 (sup.): 29. ♂.

Prosopis clandestinus Viereck, 1903. Amer. Ent. Soc, Trans. 17: 65. ♂.

Prosopis excavata Swenk and Cockerell, 1910. Ent. News 21: 70. ♀.

Hylaeus perparvus Cockerell and Sumner, 1931. Amer. Mus. Novitates 490: 10. ♂.

Species Group Unassigned

Hylaeus seclusus Cockerell and Sumner
Colo.

Hylaeus seclusus Cockerell and Sumner, 1931. Amer. Mus. Novitates 490: 12. ♂.




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Genus HYLAEUS Subgenus PROSOPELLA Snelling

Hylaeus subg. Prosopella Snelling, 1966. Biol. Soc. Wash., Proc. 79: 139.
Type-species: Hylaeus hurdi Snelling. Monotypic and orig. desig.

Revision: Snelling, 1966. Biol. Soc. Wash., Proc. 79: 139-144.

Hylaeus hurdi Snelling
Ariz.; Mexico (Chihuahua). Pollen: Unknown, but visits flowers of Baccharis,
Ceanothus including C. greggii, Melilotus alba, Penstenwn campanulatus, Verbesina.
Hylaeus (Prosopella) hurdi Snelling, 1966. Biol. Soc. Wash., Proc. 79: 140, fig. 1. tJ, 9.

Genus HYLAEUS Subgenus HYLAEANA Michener

Hylaeus subg. Hylaeana Michener, 1954. Amer. Mus. Nat. Hist., Bui. 104: 28.

Type-species: Hylaeus panamensis Michener. Monotypic and orig. desig.

Hylaeus panamensis Michener
Tex. west to South. Calif., south to Panama. Pollen: Unknown, but
visits flowers of Dicraurus, Hyptis enioryi, Verbesina encelioides.
Hylaeus (Hylaeana) panamensis Michener, 1954. Amer. Mus. Nat. Hist., Bui. 104: 28. ♂.

Taxonomy: Snelling, 1968. Los Angeles Co. Mus., Contrib. Sci. 144: 4 (as H. aztecus).
—Snelling, 1975. Los Angeles Co. Mus., Contrib. Sci. 267: 8 (tax. status).

Genus HYLAEUS Subgenus HYLAEUS Fabricius

Hylaeus Fabricius, 1793. Ent. system., v. 2, p. 302.

Type-species: Apis annulata Linnaeus. Desig. by Latreille, 1810 (=Prosopis
annulata Fabricius).

Revision: Snelling, 1970. Los Angeles Co. Mus., Contrib. Sci. 180: 1-27, figs. 1-6.

Species Group Bisinuatus

Hylaeus bisinuatus Forster
Holarctic; Transcont. south. Canada and north. U. S., south to Ga. and
Calif. (Central Valley); introduced into Hawaii; Europe. Possibly introduced from
Europe into the area around Fargo N. D. prior to 1912. Pollen: Exhibits a pronounced
tendency toward oligolecty on flowers of the family Leguminosae, especially the
introduced species of Melilotus, but also visits the flowers of other, mostly introduced,
plants including those of the Amaranthaceae, Asclepiadaceae, Compositae,
Cruciferaceae, Polygonaceae, Salicaceae, Tamaricaceae, Umbelliferae.

Hylaeus bisinuatus Forster, 1871. Zool.-Bot. Gesell. Wien, Verhandl. 21: 935. ♀, ♂.

Prosopis leptocephala Morawitz, 1871. Soc. Ent. Ross., Horae 7: 324. ♀, ♂.

Prosopis (Hylaeus) discrepans Schenck, 1875. Deut. Ent. Ztschr. 19: 326. ♂.

Prosopis stevensi Crawford, 1913. Canad. Ent. 45: 155. ♂, ♀.

Prosopis incompleta Alfken, 1937. 1st. Ent. Bologna, Bol. 9: 104. ♀.

Taxonomy: Snelling, 1970. Los Angeles Co. Mus., Contrib. Sci. 180: 26-27 (as H. stevensi).
—Snelling, 1975. Los Angeles Co. Mus., Contrib. Sci. 267: 8-9 (synonymy).

Biology: Barrows, 1975. Psyche 82: 74-75 (nest).

Species Group Conspicuus

Hylaeus conspicuus (Metz)
Wash., Oreg., Idaho, Calif., Nev., Wyo. Pollen: Unknown, but visits flowers
of Anthemis cotula, Asclepias, Baccharis, Calochortus luteus, Ceanothus soredatus,
Centaurea solstitialis, Eriodictyon califomicum, Eriogonum fasciculatum, Eryngium
aristatuluni, Foeniculum vulgare, Frankenia grandiflora, Gnaphaliuni califomicum,
Grindelia, Hemizonia pungens, Lasthenia, Medicago sativa, Melilotus, Phacelia distans,
Prunus ilicifolia, Salix, Salsola kali, Solidago elongata, Trichostema. Predator:
Philanthus pulcher Dalla Torre.
Prosopis conspicua Metz, 1911. Amer. Ent. Soc, Trans. 37: 114. ♂, ♀.

Hylaeus maritimus Bridwell
Calif, (coastal sand dunes). Pollen: Unknown, but visits flowers of
Achillea borealis arenicola, Agoseris aparagoides, Eriogonum, Grindelia robusta
platyphylla, Hemizonia corymbosa var. barclayi, Phacelia dista^is. Polygonum
paronychia.
Hylaeus maritimus Bridwell, 1910. Hawaii. Ent. Soc, Proc 4: 159. ♀, ♂.




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Species Group Mesillae



Hylaeus fedorica (Cockerell)
Mich, to Minn., south to Tex. and east to N. C. Pollen: Unknown, but
visits flowers of Crataegus, Daucus, Pyracantha.

Prosopis digitata wax. fedorica Cockerell, 1^09. Ann. and Mag. Nat. Hist. (8) 4: 27. ♂.

Prosopis grossicomis Swenk and Cockerell, 1910. Ent. News 21: 67. ♂.

Hylaeus granulatus (Metz)
Nev., Calif., ?Colo.

Prosopis nidbeckiae var. granulatus Metz, 1911. Amer. Ent. Soc, Trans. 37: 114. ♂.

Hylaeus labiatifrons (Cockerell)
Ga. Possibly a synonym of H. cressoni cressoni (Cockerell).

Prosapis labiatifrons Cockerell, 1896. Psyche 7 (sup.): 437. ♂.

Hylaeus mesillae
***authority mismatch
cressoni (Cockerell). Transcont. from south. Canada to north. Mexico. Ecology: Nests
in twigs of Symphoricarpos. Parasite: Rhydinofoenus floridanus bradleyi Townes, R.
visaliae Bradley. Pollen: Polylectic, visits a wide variety of flowers including Achillea
millaefolium, A. lanulosa, Adenostoma fasciculatum, Alyssum maritinium, Amorpha,
Anethum, Anthemis cotula, Apium graveolens, Apocynum, Aruncus, Asclepias
fascicularis, A. mexicana, A. parishii, Aster adscendens delectabilis, Atriplex
semibaccata, Baccharis douglasii, B. emoryi, B. glutinosa, B. pilularis, Blephilia,
Boltonia, Brassica oleracea, Cacalia, Capsella, Cardanmie, Castanea, Castanopsis,
Ceanothus crassifolius, C. cuneatus, C. integerrimus, Cerastium, Chamaebatia foliolosa,
Chrysothamnus consimilis, C. nauseosus speciosus, Cicuta, Cirsium vulgare, Cleome,
Cleomella obtusifolia, Comus, Crataegus, Cryptantha angustifolia, Cryptotaenia,
Datura meteloides, Daucus carota, Descurainia sophia, Encelia farinosa, Epilobium,
Eremocarpus setigerus, Erigeron canadensis, Eriodictyon califomicum, Eriogonum
elongatum, E. gracile, E . fasciculatum, E. nodosum, E. nudum, E. saxatile, E.
subscaposum, E. vimiyieum, E. wrightii, Eriophyllum confertiflorum, Eryngium
aristatulum, Eschscholzia caespitosa, E. califomica, Eulophus, Eupatorium, Euphorbia
albomarginata, Evonymus, Foeniculum vulgare, Fragaria, Galium, Geum, Gnaphalium
califomicum, Gutierrezia califomica, G sarothrae, Haplopappus arborescens, H.
palmeri, Heliotropium curvassavicum, Heracleum, Heteromeles arbutifolia, Holodiscus
discolor. Hydrangea, Krigia, Lasthenia chrysostoma, L. gracilis, Lepidium,
Lepidospartum, Lotus americanus, Lupinus paynei, Lycopus, Malus, Malva, Maytenus
boaria, Melilotus alba, Mentha pulegium, Monardella lanceolata, Nemophila menziesii,
Oenothera tanacetifolia, Osmorrhiza, Oxypolis, Parthenium, Pastinaca, Perideridia
gairdneri, Phacelia distans, P. ramosissima, Philibertia heterophylla, Polygonum,
Polytaenia, Potentilla glandulosa, Prosopis, Prunus ilicifolia, Pycnanthemum,
Pyracantha, Rhamnus califomica, R. crocea, Rhus diversiloba, Rosa, Rubus, Salix
exigua, S. goodingii, S. laevigata, S. lasiolepis, S. nigra. Salvia, apiana, S. mellifera, S.
officinalis, S. stachyoides, Sanicula, Schinus molle, Scrophularia califomica, Sedum,
Sisymbrium irio, Sium, Solidago califomica, S. occidentalis, Stanleya pinnata, Swertia
parryi, Taenidia, Tamarix gallica, Tetradymia canescens, Thaspium, Trichostema
lanceolatum, T. parishii, Valerianella, Verbena lasiostachys, Veronica, Viburnum,
Zizia.

Prosopis pygmaea Cresson, 1869. Boston Soc. Nat. Hist., Proc. 12: 272. 6- Preocc.

Prosopis cressoni Cockerell, 1907. Ann. and Mag. Nat. Hist. (7) 20: 131. N. name.

Prosopis pasadenae Cockerell, 1910. Ann. and Mag. Nat. Hist. (8) 5: 30. ♂, ♀.

Prosopis telepora Lovell, 1911. Ent. News 22: 213. ♀, ♂.

Hylaeus laciniatus Cockerell and Sumner, 1931. Amer. Mus. Novitates 490: 9. ♂.

Hylaeus repolitus Cockerell and Sumner, 1931. Amer. Mus. Novitates 490: 13. ♀.

Biology: Rau, 1922. Acad. Sci. St. Louis, Trans. 24: 36 (as pygmaeus and cressoni). —Hicks,
1926. Colo. Univ., Studies 15: 221.

Morphology: Blum and Bohart, 1972. Ent. Soc. Amer., Ann. 65: 274 (mandibular gland
pheromones).

Hylaeus mesillae
***authority mismatch
mesillae (Cockerell). Nebr., Kans., Tex. west to Nev., Calif.; Mexico (Baja California,
Chihuahua, Coahuila, Nuevo Leon and Sonora). Populations in Colo, and Utah are
largely sympatric with those of the nominate subspecies and hybridization occurs in
these areas. Pollen: Unknown, but visits flowers of Croton califomicus. Datura




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meteloides, Encelia farinosa, Eriogonum fasciculatum, E. heermannii, Melilotus alba,
Prosopis, Sphaeralcea ambigua.

Prosopis subtilis Cockerell, 1895. Amer. Ent. Soc, Trans. 22: 295. ♀. Preocc.

Prosopis mesillae Cockerell, 1896. Canad. Ent. 28: 42. N. name.

Prosopis cressoni var. magnidavis Swenk and Cockerell, 1910. Ent. News 21: 68. ♂, ♀.

Hylaeus rudbeckiae (Cockerell and Casad)
Canada (Ontario), transcont. U. S. from Conn.,? N. J., ?Ala.
to Rocky Mts. and Pacific Coast. Pollen: Unknown, but in California visits flowers of
Achillea millaefolium, Alyssum maritimum, Angelica arguta, Antheniis cotula,
Asclepias, Baccharis douglasii, B. emoryi, B. glutinosa, B. viminea, Calochortus
venustus, Calyptridium umbellatum, Chrysothamnus, Cirsium, Ceanothus crassifolius,
Descurainia sophia, Eriodictyon califomicum, Eriogonum elatum, E. fasciculatum, E.
latifolium nudum, E. viminetim,, Foeniculum vulgare, Horkelia fusca, Lasthenia
chrysostoma, Mimulus, Phacelia distans, Potentilla glandulosa. Ranunculus
califomicus, Rhus diversiloba, Salix goodingii, Sedum, Sisymbrium, Solidago,
Symphoricarpos Trichostema lanatum, Veronica americana.

Prosopis rudbeckiae Cockerell and Casad, 1895. Amer. Ent. Soc, Trans. 22: 380. ♂.

Prosapis bakeri Cockerell, 1896. Psyche 7 (sup.): 26. ♂.

Prosapis digitatus Cockerell, 1896. Psyche 7 (sup.): 30. ♂.

Prosapis rudbeckiae ruidosensis Cockerell, 1896. Psyche 7 (sup.): 30. ♂.

Prosapis rudbeckiae subdigitata Cockerell, 1896. Psyche 7 (sup.): 31. ♂.

Hylaeus saniculae (Robertson)
Canada (Ontario, Nova Scotia), and New England States west to Minn.,
south to Tenn., Ga. Pollen: Unknown, but visits flowers o{ Achillea, Amorpha fruticosa,
Apocynum cannabinum, Aruncus Sylvester, Cicuta maculata, Crataegus crus-galla,
Cryptotaenia cayiadensis, Eulophus americanus, Heracleum lanatum. Polygonum
scandens, Sayiicula canadensis, S. marilandica, Taenidia integerrima, Thaspium
aureum trifoliatiim.

Prosopis saniculae Robertson, 1896. Canad. Ent. 28: 137. ♂, ♀.

Hylaeus sejunctus Snelling
Ariz. (Yuma), Nev. (Searchlight), south. Calif, deserts; Mexico (Mexicali).
Pollen: Unknown, but visits flowers of Croton califomicus, Cryptantha barbigera,
Heliotropium curassavicum, Hyptis emoryi, Isomeris arborea Melilotus, Phacelia,
Prosopis glandulosa var. torreyanum, Salix, Tamarix gallica.

Hylaeus (Hylaeus) sejunctus Snelling, 1970. Los Angeles Co. Mus., Contrib. Sci. 180: 18,
figs. 6,9.

Species Group Ellipticus

Hylaeus ellipticus (Kirby)
Alaska to Nova Scotia and Newfoundland, New England States south to
Ga., west to Pacific Coast States. Parasite: Aetroxys analis Ashm., Chrysis parvula
Fabr., Coelopencyrtus hylaeoleter Burks, Encyrtus sp., Gasteruption assectator (L.).
Pollen: Unknown, but visits flowers of Acer apicatum, Arenaria, Aruncus, Ceanothus,
Chrysanthemum, Eriogonum mariifolium, Houstonia purpurea. Hydrangea, Mains,
Oxypolis, Penstemon heterodoxus, P. newberryi, Potentilla glandxdosa, Rhus, Rosa,
Rubus, Solidago multiradiata, Sphenosciadium capitellatum. Taraxacum. Predator:
Philanthus pulcher Dalla Torre.

Prosopis elliptica Kirby, 1837. Fauna Bor.-Amer., v. 4, p. 266. ♀.

Prosopis antennata Cresson, 1869. Boston Soc. Nat. Hist., Proc. 12: 271. ♂.

Prosopis varifrons Cresson, 1869. Boston Soc. Nat. Hist., Proc. 12: 270. ♀.

Taxonomy: Mitchell, 1960. N. C. Agr. Expt. Sta. Tech. Bui. 141: 71.

Biology: Davidson, 1895. Psyche 7: 315-316. -Fye, 1965. Canad. Ent. 97: 864-865, fig. 1, table
1 (nest). — Medler, 1966. Ent. Soc. Wash., Proc. 68: 131.

Species Group Verticalis

Hylaeus verticalis (Cresson)
Southeast Canada and transcont. U. S. Pollen: Unknown, but visits

flowers of Allium haematochiton, Apocynum androsaemifolium, Arctostaphylos patula,
Asclepias, Baccharis, Ceanothus cordulatus, C. integerrimus, C. soredatus, Chamaebatia
foliolosa, Collinsia heterophylla, Cryptantha intermedia, Diplacus auriantiacus,
Eriodictyon califomicum, E. trichocalyx, Eriogonum, Eriophyllum multicaule.




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Erysimum, Euphorbia crenulata, Heracleum lanatum, Horkelia parryi, Lomatium
dasycarpum, Lupinus, Malus, Microseris nutans, Nemophila aurita, Penstemon
grinnelU, P. palmeri, Phacelia distans, P. humilis, Poteyitilla glandidosa, Prunus
subcordata, Rhamnus califomicus, R. crocea, R. rubra, Ribes, Rosa califortiica, Rubus
leucodemiis, Salix, Scrophularia califomica, S. laciniata, Solidago canadensis, S.
multiradiata, Tamarix. Predator: Philanthus politus Say.

Prosopis verticalis Cresson, 1869. Boston Soc. Nat. Hist., Proc. 12: 271. ♂.

Prosapis fridentulus Cockerell, 1896. Psyche 7 (sup.): 27. ♂.

Prosopis tridens Cockerell, 1896. Psyche 7 (sup.): 28. ♂.

Prosopis subtristis Swenk and Cockerell, 1910. Ent. News 21: 70. ♀.

Prosopis melitina Lovell, 1911. Ent. News 22: 214. ♀.

Biology: Fye, 1965. Canad. Ent. 97: 867, table 1 (nest).

Genus HYLAEUS Subgenus CEPHALYLAEUS Michener

Hylaeus subg. Cephalylaeus Michener, 1942. N. Y. Ent. Soc, Jour. 50: 273.
Type-species: Prosopis basalis Smith. Orig. desig.

Revision: Snelling, 1968. Los Angeles Co. Mus., Contrib. Sci. 144: 1-3.

Hylaeus basalis (Smith)
Transcont. in U. S., south. Canada (montane areas, alpine in southern

distribution). Pollen: Unknown, but exhibits a decided preference for flowers of the
Rosaceae; visits a wide variety of flowers including Arctostaphylos patula, Calochortus
leichtlinii, Ceanothiis, Ckamaebatia foliolosa, Cymopterus terebinthus, Erigeron
coulteri, Eriogonum mariifolium, Horkelia fusca, Oxypolis occidentalis, Phyllodoce
breweri, Potentilla fruticosa, P. glandidosa, Rhamnus califomica, Rubus,
Sphenosciadium capitellatum, Veronica aniericana. Predator: Philanthus pulcher
Dalla Torre.
Prosopis basalis Smith, 1853. Cat. Hym. Brit. Mus., v. 1, p. 22. ♀, ♂.

Biology: Fye, 1965. Canad. Ent. 97: 864, table 1 (nest).

Hylaeus nunenmacheri Bridwell
Calif, (sea level to moderate elevations in the Coast Ranges and

Sierra Nevada). Pollen: Unknown, but exhibits a decided preference for the flowers of
the Rosaceae; visits a wide variety of flowers including Arctostaphylos patula,
Baccharis, Ceanothus cordulatus, C. cuyieatus, C. greggii, C. integerrimus, C. soredatus,
Ckamaebatia foliolosa, Cryptantha, Eriodictyon angustifolium, E. califomicum,
Phacelia distans, Prunus emarginata. Ranunculus occidentalis, Rhamnus califomicus,
R. crocea, Rhus diversiloba, Salix lasiolepis, Solidago califomica, Thysanocarpus
curvipes.
Hylaeus Nunemacheri Bridwell, 1919. Hawaii. Ent. Soc, Proc. 4: 157. ♀.

Genus HYLAEUS Subgenus METZIELLA Michener

Hylaeus subg. Metziella Michener, 1942. N. Y. Ent. Soc, Jour. 50: 273.

Type-species: Prosopis potens Metz. Monotypic and orig. desig. (=Prosopis sparsa
Cresson).

Revision: Snelling, 1968. Los Angeles Co. Mus., Contrib. Sci. 144: 3-4.

Hylaeus sparsus (Cresson)
Canada (Quebec), eastern U. S. (Mich, to N. Y. south to Ga.) west to Tex.
Pollen: Unknown, but visits flowers of Eidophus americanus, Osmorrhiza longistylis,
Thaspium aureum trifoliatum.
Prosopis sparsa Cresson, 1869. Boston Soc. Nat. Hist., Proc. 12: 271. ♀.
Prosopis thaspii Robertson, 1898. Acad. Sci. St. Louis, Trans. 8: 43. ♀.
Prosopis potens^ Metz, 1911. Amer. Ent. Soc, Trans. 37: 103. ♂.

Genus HYLAEUS Subgenus Unassigned

Hylaeus formosus Krombein
Fla. (Key Largo, Stock Is.); West Indies (Bahamas). Pollen: Unknown,
but visits flowers of Metopium toxiferum.
Hylaeus formosus Krombein, 1953. Amer. Mus. Novitates 1633: 19. ♀.
Hylaeus metopii Mitchell, 1960. N. C. Agr. Expt. Sta. Tech. Bui. 141: 80. ♀.




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Taxonomy: Krombein, 1967. U. S. Dept. Agr., Agr. Monog. 2, Sup. 2, p. 423.

Hylaeus graenicheri Mitchell
Fla. (Miami, Key Largo, Plantation Key, and Saddlebunch Keys). Pollen:
Unknown, but visits flowers of Metopium toxiferum, Flaveria linearis.
Hylaeus graenicheri Mitchell, 1951. Elisha Mitchell Sci. Soc, Jour. 67: 240. ♀.

Taxonomy: Mitchell, 1960. N. C. Agr. Expt. Sta. Tech. Bui. 141: 79. — Snelling, 1966. South.
Calif. Acad. Sci., Bui. 65: 174.

Hylaeus suffusus (Cockerell)
Nev. Possibly a Paraprosopis.

Prosapis suffusa Cockerell, 1896. Psyche 7 (sup.): 32. ♂.

Taxonomy: Snelling, 1966. South. Calif. Acad. Sci., Bui. 65: 174. —Snelling, 1970. Los Angeles
Co., Mus., Contrib. Sci. 180: 58.

Hylaeus tuertonis (Cockerell)
N. Mex. (Tuerto Mts. near Santa Fe), Colo. (Florissant). Possibly a
Paraprosopis and may be a synonym of H. wootoni (Cockerell).
Prosopi's tuertonis Cockerell, 1906. Amer. Mus. Nat. Hist., Bui. 22: 423. ♀.


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