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Andrena personata Robertson, 1897
Life   Insecta   Hymenoptera   Apoidea   Andrenidae   Andrena
Subgenus: Micrandrena

Andrena personata, Mid-Atlantic Phenology
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Andrena personata, Mid-Atlantic Phenology

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Andrena personata, f, md, eastern neck nwr, back
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Andrena personata, f, md, eastern neck nwr, back
Andrena personata, f, md, eastern neck nwr, face
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Andrena personata, f, md, eastern neck nwr, face

Andrena personata, f, md, eastern neck nwr, side
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Andrena personata, f, md, eastern neck nwr, side
Andrena personata, figure31e
Mitchell, Bees of the Eastern United States, Vol. I, 1960 · 1
Andrena personata, figure31e

Andrena personata, figure33e
Mitchell, Bees of the Eastern United States, Vol. I, 1960 · 1
Andrena personata, figure33e
Andrena personata, male, face
© Rebekah Andrus Nelson · 1
Andrena personata, male, face

Andrena personata, male 155909, dorsal genitalia
© Copyright Deana Crumbling 2010 · 1
Andrena personata, male 155909, dorsal genitalia
Andrena personata, male 155909, face
© Copyright Deana Crumbling 2010 · 1
Andrena personata, male 155909, face

Andrena personata, male155909, genitalia lateral view
© Copyright Deana Crumbling 2010 · 1
Andrena personata, male155909, genitalia lateral view
Andrena personata, male 155909, lateral body
© Copyright Deana Crumbling 2010 · 1
Andrena personata, male 155909, lateral body

Andrena personata, male 155909, lateral thorax
© Copyright Deana Crumbling 2010 · 1
Andrena personata, male 155909, lateral thorax
Andrena personata, male 155909, wing marginal cell
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Andrena personata, male 155909, wing marginal cell

Andrena personata, male 155909, propodeal triangle
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Andrena personata, male 155909, propodeal triangle
Andrena personata, male 155909, scutum
© Copyright Deana Crumbling 2010 · 1
Andrena personata, male 155909, scutum
Overview
Reprinted with permission from the University of Nebraska State Museum from: Ribble, D. W. 1968. Revisions of two subgenera of Andrena, Micrandrena Ashmead and Derandrena new subgenus (Hymenoptera: Apoidea). Bulletin of the University of Nebraska State Museum 8: 1-124.

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Early in his work Robertson (1891-1894) did not differentiate personata and ziziae, as shown by his notebooks and specimens. It was not until 1897 that he recognized that ziziae (s.lat.) should be divided into ziziae (s.str.) and personata. Museum specimens of personata with determination labels indicate that it is still occasionally confused with ziziae by various workers.

Andrena personata is usually easy to separate from related species. The integument of both sexes does not give metallic reflections. The female has narrow facial foveae which are not greatly widened dorsally. The hind tibia is broad with short corbicular hairs (like Scaphandrena), the hairs overlap only slightly, making the tibial surface easily visible, and the hairs do not orientate in the same direction but spread outward. There are short plumose hairs on the mesoscutum which give a slight moss-like appearance. The male has a yellow clypeus, yellow parocular areas, and long, shiny antennae with the first flagellar segment noticeably shorter than the others. The posterior expansion of the penis valve is also helpful in separating this species (fig. 8) from related species.

The descriptions below are based mainly on a female paratype (Carlinville, Illinois, May 22, 1893, Charles Robertson no. 14144, on Crataegus crus-galli) and a male paratype (Carlinville, Illinois, May 18, 1893, Charles Robertson no. 14035, on Potentilla canadensis). Four hundred and forty-four other specimens were also examined.

FEMALE. MEASUREMENTS AND RATIOS. — Length, 6.1 mm; width of mesothorax, 1.7 mm; wing length from tegula, 4.8 mm; facial length/width, 1.12; foveal length/width, 4.77.

INTEGUMENTAL COLOR. — Black to red-brown (without noticeable reflections of other colors) except: flagellum light brown below; apex of tegula amber; terga with rather broad amber apices; sterna with narrow amber apices; color otherwise as in piperi.

STRUCTURE. — Sculpturing in general finer over entire body than in piperi. Head otherwise as in piperi except: scape nearly as long as flagellar segments 1-5; flagellar segment 1 slightly shorter than 2 and 3 together; eye about three and one-half times as long as broad in anterior view; maxillary palpus with segments in ratio of about 1.4:1.4:1.1:1.3:1.0:1.3; labial palpus with segments in ratio of about 2.1:1.0:1.2:1.4; labral process about three times as wide and three-fourths as long as entire labrum, apex broadly rounded; clypeus about half again as wide as long, protruding beyond lower margin of eye by about half width of eye in lateral view; vertex extending past lateral ocellus by half an ocellar width; facial fovea barely reaching upper eye margin, dorsally half width of eye.

Mesosoma as in piperi except: metanotum slightly more coarsely sculptured than mesoscutum; enclosure of propodeum surface with rather coarse shagreening becoming rugose towards base and center; posterior and lateral surfaces of propodeum divided by a ridge; posterior and dorsolateral areas of propodeum not raised noticeably above enclosure, shagreening fairly regular; hind tibia broadened, half again as wide as basitarsus; pterostigma medium-sized, slightly more than half again as wide as prestigma; first transverse cubital vein ending about two and one-half vein widths from pterostigma.

Metasoma as in piperi.

VESTITURE. — Hairs as in piperi except: foveal hairs white; hairs on dorsum of thorax light yellowish, approaching the moss-like appearance in piperi; terga 1-4 hairs (except apical fasciae) not very plumose, abdomen not having a dusty appearance; apical fasciae absent on tergum 1, interrupted on terga 2 and 3; tibial scopal hairs much shorter, overlapping only slightly, spreading outward, not all orientated in same direction, making tibial surface easily visible.

MALE. MEASUREMENTS AND RATIOS. — Length, 5.5 mm; width of mesothorax, 1.5; wing length from tegula, 4.2 mm; facial length/width, 1.09; flagellar segment 1/segment 2, 0.80.

INTEGUMENTAL COLOR. — Body black to red-brown (without noticeable reflections of other colors) except: clypeus and lower ends of parocular areas yellow; flagellum orange-brown below; pterostigma dark like veins; tegula amber; color otherwise as in piperi.

STRUCTURE. — Sculpturing in general finer over entire body than in piperi. Head otherwise as in piperi except: antenna very shiny, reaching abdomen; scape nearly as long as flagellar segments 1-3; segment 1 distinctly shorter than 2, much shorter than 3; eye slightly less than twice as long as broad in anterior view; maxillary palpus as in female but segments in ratio of about 1.0:1.1:1.0:1.1:1.0:1:3; labial palpus as in female but segments in ratio of about 2.1:1.0:1.0:1.2; labrum about three times as wide as long; labral process about one-third as wide and one-third as long as entire labrum, expanded toward base, apex truncate; clypeus about two-thirds as long as wide, punctures indistinct.

Mesosoma as in per sonata female except: ridge on propodeum dividing posterior and lateral surfaces noticeable only at base of propodeum; hind tibia unmodified.

Exposed metasoma as in piperi.

Sternum 7 slightly emarginate, producing two large rounded lobes, each lobe bearing numerous long branched hairs (fig. 9). Sternum 8 nearly flat from side to side; base flexed ventrad, expanded into large plate (fig. 10), posteriorly sides coming to a point; apex slightly expanded, weakly bilobed; shaft very long, longer than basal plate; sternum with apical half setose, setae dense, long, branched, mostly straight, some setae reaching beyond apex. Gonocoxite bent downward; apex expanded in lateral view, dorsolateral part with many, mostly branched setae; dorsal lobes much reduced. Penis valve bent downward, apex narrowly rounded and bent posteriorly in lateral view, greatly produced posteromedially, most posterior part with lamellae (figs. 6-8).

VESTITURE. — Hairs as in piperi except: apical abdominal fasciae absent on tergum 1; apex of sternum 6 without tuft of hairs.

VARIATION. — The underside of the antennae varies in color in both sexes. In the male it may be brown to orange and in the female black to orange-brown. Otherwise this species is relatively constant in morphology and color.




Reprinted with permission from: Mitchell, T.B. 1960. Bees of the Eastern United States. North Carolina Agricultural Experiment Station Technical Bulletin No. 141.

FEMALE — Length 6 mm.; face slightly longer than broad; clypeus broadly convex, projecting about one-third below suborbital line, smooth but rather dull, punctures exceedingly minute, shallow and sparse; facial foveae very narrow, occupying above hardly half of space between eyes and ocelli (as in fragariana, fig. 29), covered with pale ochraceous tomentum; space between margin of vertex and lateral ocelli extremely short, ocelli nearly touching margin; cheeks very slightly narrower than eyes, rounded posteriorly, rather dull, punctures hardly evident; malar space lacking; basal segment of flagellum slightly shorter than 2nd and 3rd combined, flagellum apically rather dark reddish-ferruginous; process of labrum rather small, semicircular, length about half the basal width; pubescence of head and thorax quite short, entirely pale, tinged with yellowish above, that on legs entirely pale; thoracic integument dull, finely tessellate, punctures of scutum very minute and obscure, hardly evident, surface rather densely tessellate, those on scutellum exceedingly minute and obscure, surface somewhat more shining; pleura without visible punctures; dorsal area of propodeum rather extensive, nearly horizontal, triangle rather coarsely subrugose toward basal middle; propodeal corbicula poorly developed, short, without an anterior fringe, pale ochraceous; trochanteral floccus rather short, but well developed, whitish; hind tibiae gradually broadened to apex, which is about twice width of basitarsi, scopa quite dense, hairs rather short, simple, entirely pale; fore and mid basitarsi slightly narrower than their respective tibiae; 2nd submarginal cell slightly shorter than 3rd, receiving 1st recurrent near middle; abdominal terga rather smooth but dull, very finely tessellate, without visible punctures, apical margins very narrowly and obscurely impressed, these areas broadly hyaline, discal pubescence extremely short, sparse and obscure, entirely pale, forming rather dense, pale ochraceous or whitish, apical fasciae on terga 2-4, somewhat interrupted medially on tergum 2, tergum 5 with a brownish, apical fimbria.

MALE — Length 6 mm.; face very slightly longer than broad, with small but distinct yellow maculae below between clypeus and eye margin; clypeus broadly convex, projecting about one-third below suborbital line, yellow except for a pair of small blackish spots and the black apical rim, smooth and shining, punctures exceedingly minute and obscure, rather sparse; lateral ocelli nearly touching margin of vertex; cheeks slightly narrower than eyes, rounded posteriorly, dull, punctures hardly evident; malar space lacking; basal segment of flagellum short, apical width about equal to length, considerably shorter than 2nd and following segments, which are brownish-testaceous, in contrast to the dark basal segment; process of labrum rather small, subtriangular, apex narrowly rounded or subtruncate; mandibles short, with a small but distinct, inner, subapical tooth, overlapping hardly at all; pubescence of head, thorax and legs entirely whitish, thoracic integument dull, rather densely tessellate, punctures of scutum hardly visible, scutellum somewhat more shining, with exceedingly minute, barely visible punctures; pleura not visibly punctate; dorsal area of propodeum rather extensive, nearly horizontal, triangle rather finely subrugose; all basitarsi slender and elongate, somewhat narrower than their respective tibiae; 2nd submarginal cell slightly shorter than 3rd, receiving 1st recurrent near middle; abdominal terga smooth but rather dull, microscopically tessellate, punctures inevident, narrowly impressed apically, impressed areas quite shallow, mostly hyaline; discal pubescence extremely short, thin and sparse, entirely pale, terga 2-4 with poorly developed, thin, whitish, apical fasciae evident laterally; apical portion of sternum 8 extremely long and slender, slightly broadened toward the subtruncate apex, with thin, pale pubescence; tip of penis valves abruptly constricted and flexed, more bulbous toward base, but not excavated, gonocoxites rather slender medially, abruptly broadened toward apex, gonocoxal lobes very slightly produced, rounded or subtriangular.

DISTRIBUTION — Minnesota to Connecticut, south to North Carolina and Georgia; April to June.

FLOWER RECORDS — Claytonia, Crataegus, Fragaria, Ranunculus, Rubus and Salix. Robertson (1929) records it also on the following plant genera: Arabis, Aruncus, Capsella, Cardamine, Cerastium, Ellisia, Eulophus, Geum, Gleditsia, Lepidium, Oxalis, Pastinaca, Philadelphus, Potentilla, Rhamnus, Sanicula, Sisymbrium, Stellaria, Taenidia, Thaspium and Viburnum.


Identification
Extracted from: Robertson, C. (1897). North American Bees - Description and Synonyms. Transactions of the Academy of Science od St. Louis. Vol. 7. No. 14.

Female - Tbe female of this species is distinguished from that of A. ziziae by the antennae, mandibles and teglllae being clarker; the clypeus darker, more convex, bare, reflecting purplish; lateral facial depressions more narrow, inclosure of metathorax more evenly rugose; second submarginal cell longer, nearly equaling third; receiving recurrent nerVUl'e at, or a little before, the middle; legs a little darker, abdomen about the same. Length 6-7 111m.

Male - Resembles the female; otherwise differs from the male of A. ziziae by having a whitish spot on each side of face, ,also sometimes wanting, or nearly so; antennae long, darker above, browni~h testaceolls beneath, third joint not longer than fourth. Length 5-6 mm.


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