D I S C O V E R    L I F E   
Bee Hunt! Odonata Lepidoptera 
  HomeAll Living ThingsIDnature guidesGlobal mapperAlbumsLabelsSearch
  AboutNewsEventsResearchEducationProjectsStudy sitesHelp


Epeolus pusillus Cresson, 1864
Life   Insecta   Hymenoptera   Apoidea   Apidae   Epeolus
Subgenus: None

Epeolus pusillus, Axillae mesoscutellum female
Thomas Onuferko · 9
Epeolus pusillus, Axillae mesoscutellum female

Click on map for details about points.

Links
80x5 - 240x3 - 240x4 - 320x1 - 320x2 - 320x3 - 640x1 - 640x2
Set display option above.
Click on images to enlarge.
Epeolus pusillus, Dorsal view female
Thomas Onuferko · 9
Epeolus pusillus, Dorsal view female
Epeolus pusillus, Lateral view female
Thomas Onuferko · 9
Epeolus pusillus, Lateral view female

Epeolus pusillus, Lateral view male
Thomas Onuferko · 9
Epeolus pusillus, Lateral view male
Epeolus pusillus, Ventral view female
Thomas Onuferko · 9
Epeolus pusillus, Ventral view female

Epeolus pusillus MALE CFP comp
© Copyright Laurence Packer 2014 · 7
Epeolus pusillus MALE CFP comp
Epeolus pusillus, m -
Michael Veit · 6
Epeolus pusillus, m -

Epeolus pusillus, m on Solidago --
Michael Veit · 6
Epeolus pusillus, m on Solidago --
Epeolus pusillus, m on Solidago --
Michael Veit · 6
Epeolus pusillus, m on Solidago --

Epeolus pusillus, mm X
Thomas Onuferko · 5
Epeolus pusillus, mm X
Epeolus pusillus, mm X
Thomas Onuferko · 5
Epeolus pusillus, mm X

Epeolus pusillus, M mm Xb-comp
Thomas Onuferko · 5
Epeolus pusillus, M mm Xb-comp
Epeolus pusillus, F mm X
Thomas Onuferko · 5
Epeolus pusillus, F mm X

Epeolus pusillus, mm Xb
Thomas Onuferko · 5
Epeolus pusillus, mm Xb
Epeolus pusillus, mm Xb
Thomas Onuferko · 5
Epeolus pusillus, mm Xb
Overview
Extracted with permission from: Onuferko, T.M. 2017. Cleptoparasitic Bees of the Genus Epeolus Latreille (Hymenoptera: Apidae) in Canada. Canadian Journal of Arthropod Identification No. 30: March 30, 2017. doi:10.3752/cjai.2017.30

http://cjai.biologicalsurvey.ca/o_30/o_30.html

Diagnosis. Among Canadian species, E. pusillus most closely resembles E. scutellaris. Both species exhibit the following similarities: axilla large and robust, its tip attaining or surpassing line of pale tomentum marking posterior margin of mesoscutellum, and its lateral margin arcuate; T1 with discal patch very wide; and metasomal fasciae rather thin.
Differences are as follows: in E. pusillus, mesopleuron of male entirely obscured by white tomentum; at least mesoscutellum entirely black (entirely black to entirely ferruginous in E. scutellaris); and T5 with pseudopygidial area of female narrower (apex <2 x medial length) than in E. scutellaris (apex 2 x medial length). In addition to the diagnostic differences included in the key are the following: in contrast to E. scutellaris, paramedian band of E. pusillus may be quite long, attaining or surpassing 3/5 length of entire mesoscutum; and in E. pusillus, fascia of T2 always with lobe-like anterolateral extensions of tomentum, whereas in E. scutellaris such extensions may be entirely absent.

Distribution in Canada: Central Canada (Map 12).

Reprinted with permission from: Mitchell, T.B. 1962 Bees of the Eastern United States. North Carolina Agricultural Experiment Station Technical Bulletin No. 152.


FEMALE: Length 9 mm.; black, antennal scape brownish-testaceous anteriorly, mandibles testaceous, becoming reddened at tips; tegulae and legs testaceous, mid and hind spurs piceous, tubercles and axillae more or less infused with ferruginous; lateral ocelli separated from margin of vertex by a space somewhat less than their diameter; cheeks very narrow, subcarinate posteriorly, becoming still narrower below; labrum nearly twice as broad as median length, with a pair of distinct, subapical tubercles; inner margin of mandibles with a quite distinct submedian angle; hind margin of scutellum very slightly out-curved, much exceeded by the robust, sub- triangular axillae which are very broadly joined to lateral margins of scutellum and sub-carinate laterally (fig. 110); wings with the usual three submarginal cells, subhyaline basally, becoming faintly infuscated apically, veins brownish; face quite densely pale tomentose around bases of antennae, over clypeus and cheeks, more thinly so above where it is more yellowish; margin of pronotum and tubercles, a pair of anterior longitudinal lines and extreme lateral margins of scutum, metanotum, and adjacent margin of scutellum, quite densely, pale yellow tomentose; lateral portions of posterior face of propodeum rather thinly pale tomentose, becoming more densely so beneath wing bases above; abdominal terga 1-4 with entire, transverse, yellow tomentose fasciae, these only sub-interrupted medially, somewhat separated from apical margin of discs except on 4, anterior face of tergum 1 densely yellow tomentose, median area black, basal and apical tomentose areas narrowly connected at each extreme side; tergum 5 with a subapical area of pale tomentum which encloses the small pseudopygidium; punctures deep, close and rather coarse on upper part of face, becoming very minute and densely crowded on clypeus and lower part of face, and on cheeks; pleura closely punctate below but with some definite, irregular, shining interspaces evident, very densely crowded above; scutum closely and quite coarsely punctate throughout, punctures more distinct anteriorly, densely crowded posteriorly and over entire scutellum and axillae; tegulae with very fine and close punctures throughout; abdominal terga with minute and very close, uniformly distributed punctures, these obscured by black, plumose tomentum; pseudopygidium very narrow, median length about equal to apical width.


MALE: Answers in general to description of female, but face around and below antennae very densely silvery tomentose, and entire ventral and lateral surfaces of mesothorax, as well as hind coxae, very densely silvery tomentose; pygidium subtriangular, rather narrowly rounded apically, margin carinate, basal width about equal to median length, surface rather sparsely and minutely punctate, with a few very short, suberect hairs.


DISTRIBUTION: Wyoming and Texas to Maine and Florida; April and May in Florida, August to October in the North.


FLOWER RECORDS: Aster, Erigeron, Eupatorium, Haplopappus, Helenium, Melilotus and Solidago. This is recorded by Robertson (1929) on Bidens, Boltonia, Coreopsis, Helianthus and Polygoneum.


Identification
Extracted from: Brumley R.L., (1965). A Revision of the Bee Genus Epeolus Latreille of Western America North of Mexico. All Graduate Theses and Dissertations. 2682

Female. Length 6 to 9 mm; forewing length 4 to 6.5 mm; labrum black to reddish orange ; clypeus black to reddish mahogany; antennae bright reddish orange to partially reddish orange on scape, pedicel, flagellomere I, with remaining flagellomeres brownish mahogany; pronotal lobes, tegulae, legs bright reddish orange, except coxae, trochanters occasionally mahogany; thorax black, except often reddish on mesopleuron, lateral, apical margins of axillae; metasomal terga black to reddish orange under black , appressed pubescence ; pygidium reddish orange; clypeus, frons with varying amounts of silvery, appressed pubescence; squamiform pubescence sparse, off-white to coppery on vertex, more dense on pronotum, posterior face of scutellum, metanotum, lateral margins of posterior face of propodeum; mesopleuron with appressed, silvery pubescence dorsally, less pubescent ventrally, often nearly nude; off-white scutal pubescence varying from uniformly pubescent to bands on posterior, lateral margins with two antero-median, longitudinal bands, often contiguous with pubescence of lateral margins, often extending nearly to posterior margin of scutum; metasomal tergite I with whitish or yellowish pubescence, except black antero- laterally, large, transverse band on disc: tergite II with subapical , whitish or yellowish fascia, broadened antero-laterally forming an angle of less than 90 degrees with subapical fascia; tergites Ill, IV with yellowish or whitish, apical or subapical fasciae ; tergite V with sub-silvery pubescence anterior, lateral to pseudopygidium; sternite V with a long, golden to silvery, apical fimbria; pseudopygidium about one and one half times broader than long; clypeus finely, densely punctate ; frons , vertex, scutum, scutellum moderately rugoso-punctate; mesopleuron moderately rugoso-punctate dorsally, interspaces often slightly larger than a puncture diameter, punctures often finer , denser ventrally; propodeal enclosure moderately rugose dorsally, finely, transversely, irregularly striate medially; remainder of posterior face of propodeum finely rugoso-punctate; forewings with three submarginal cells, rarely two, hyaline to subhyaline basally, more pubescent, darker apically , veins dark ferruginous to mahogany ; labrum often with weak, longitudinal carinae extending from subapical tubercles; preoccipital ridge gradually rounded dorsally, transverse depression behind compound eye lacking; flagellomere II nearly two-thirds as broad as long; axillae large, extending slightly beyond essentially horizontal dorsal face of scutellum, arcuate on outer margins; scutellum with a weak median emargination.

Male. Length 6 to 9 mm; forewing length 4 to 6 mm; This sex agrees well with description of female but differs as follows: flagellomere II three-fourths as broad as long; clypeus often densely pubescent; mesopleuron often uniformly pubescent; subapical hairs of sternites IV, V sparse, golden to silvery; pygidium large, reddish orange, with few, shallow punctures.

Extracted from: Onuferko TM (2018). A revision of the cleptoparasitic bee genus Epeolus Latreille for Nearctic species, north of Mexico (Hymenoptera, Apidae). ZooKeys 755: 1–185. https://doi.org/10.3897/zookeys.755.23939

Diagnosis. The following morphological features in combination (excluding any that are specific to the opposite sex of the one being diagnosed) can be used to tell E. pusillus apart from all other North American Epeolus except E. basili, E. nebulosus, and E. novomexicanus: the axilla is large, with the tip extending well beyond the midlength of the mesoscutellum but at most to the band of pale tomentum along its posterior margin, dilated laterally, and usually ferruginous to some degree (rarely all black) whereas the mesoscutellum is entirely black; the axilla’s free portion is clearly less than 2/5 as long as its entire medial length; the mesopleuron is closely (most i<1d) and evenly punctate, that of the female is obscured by white tomentum only in the upper half (with a large, sparsely hairy circle occupying much of the ventrolateral half) whereas that of the male (excluding the hypoepimeral area) is entirely obscured by white tomentum; the T1–T3 apical fasciae are complete or only very narrowly interrupted medially; the T2 fascia has lobe-like anterolateral extensions of tomentum; and the pseudopygidial area of the female is lunate and wider than long (the apex ≤2 × the medial length). Epeolus basili, E. nebulosus, E. novomexicanus, and E. pusillus are all extremely similar to one another. Whereas in E. basili the flagellum, at least ventrally, is the same reddish-orange color as the legs (tibiae to tarsi) as are usually the metasomal sterna, in E. pusillus the flagellum, except sometimes F1, and metasomal sterna are consistently brown or black and clearly not the same reddish-orange color as the legs (tibiae to tarsi). Whereas in E. nebulosus and E. novomexicanus the longitudinal extent of the T1 discal patch is less than or equal to the breadth of the apical fascia and the T2–T4 fasciae are on or very little removed from the apical margin and more or less evenly broad, in E. pusillus the longitudinal extent of the T1 discal patch is no less (and usually greater) than the breadth of the apical fascia and the T1–T3 apical fasciae are removed from the apical margin and commonly narrowed or narrowly interrupted medially. Epeolus pusillus is also similar to E. scutellaris in that the axilla is large, with the lateral margin arcuate, and that the apical fasciae are complete or only very narrowly interrupted medially. However, in E. scutellaris the pseudopygidial area of the female is much wider (the apex ~2.5–3 × the medial length) than in E. pusillus, and the mesopleuron of both the female and male is obscured by white tomentum only in the upper half (with a large, sparsely hairy circle occupying much of the ventrolateral half). Despite the species name ‘pusillus’, meaning very small in Latin, the size range overlaps too much with other species to be diagnostic.


Names
Scientific source:

Supported by

Hosts · map
FamilyScientific name @ source (records)
Asteraceae  Achillea millefolium @ UCMS_ENT (1)

Erigeron strigosus @ CUIC_ENT (1)

Pityopsis falcata @ UCMS_ENT (7)

Pluchea @ UCMS_ENT (1)

Solidago nemoralis @ UCMS_ENT (1)

Solidago sempervirens @ UCMS_ENT (2)
Lamiaceae  Ocimum basilicum @ UCMS_ENT (1)
Plumbaginaceae  Limonium carolinianum @ UCMS_ENT (1)
_  Withheld @ BBSL (54)

go to Discover Life's Facebook group

Updated: 2024-07-19 09:55:46 gmt
Discover Life | Top
© Designed by The Polistes Corporation