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
Diagnosis. This species most closely resembles E. pusillus,
but can be easily distinguished as follows: mesopleuron of male
not entirely obscured by white tomentum (unlike in E. pusillus),
but with sparsely hairy circle occupying much of ventrolateral
half; and T5 with pseudopygidial area of female wider (apex 2
x medial length) than in E. pusillus (apex <2 x medial length).
For a comprehensive list of secondary distinguishing features
and similarities to E. pusillus, see diagnosis for E. Dusillus.
Distribution in Canada: Atlantic and Central Canada (Map
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 9-10 mm.; black, antennal scape, legs and tegulae testaceous, mandibles, tubercles, narrow margin of the pronotum, lateral margins of scutum, and entire scutellum and axillae, ferruginous, mid and hind spurs rather dark; space between margin of vertex and lateral ocelli slightly less than their diameter; cheeks about half width of eyes, subcarinate posteriorly, somewhat more narrowed below; median length of labrum somewhat more than half the breadth, with a pair of small, subapical tubercles; inner margin of mandibles with a low, median angle; posterior margin of scutellum nearly straight, very shallowly impressed medially, axillae extensive, subtriangular, broadly joined to lateral margins of scutellum, subcarinate laterally, tips protruding somewhat beyond its posterior margin (fig. 110); wings with the usual three submarginal cells, subhyaline basally, becoming lightly infuscated apically, veins brownish-testaceous; face pale tomentose around bases of antennae, otherwise very thinly pubescent; venter of thorax and anterior face of mesopleura densely tomentose, posterior margin of pronotum, a pair of narrow longitudinal lines on scutum anteriorly, metanotum and adjacent margin of scutellum, all pale yellowish tomentose, tubercles fringed with the same color; abdominal terga 1-4 with transverse, apical, yellow tomentose fasciae, very slightly interrupted medially on 1 and 2, entire on 3 and 4, slightly separated from apical margin on 1-3; tergum 1 with yellow tomentum basally, interrupted medially, interveining black patch very broad, extending nearly from one extreme side to the other, basal and apical yellow tomentose areas very narrowly joined at each extreme side; tegulae with quite deep and slightly separated punctures anteriorly, these becoming much more minute and close posteriorly; vertex and upper part of face rather coarsely and very closely and deeply punctate, the punctures becoming minute and densely crowded over clypeus and lower half of face, those on checks close but distinct, not crowded; scutum, scutellum and axillae densely and rather coarsely rugoso-punctate throughout, somewhat more coarsely so on latero-anterior areas; pleura closely punctate below but with a few irregular, shining, intervening spaces evident, becoming densely rugose above; punctures of abdominal terga very fine and uniformly close throughout, finer and more densely crowded on tergum 5, this with a transverse, apical band of pale tomentum covering about half of disc and completely enclosing the pseudopygidium which is broad and quite short, median length slightly less than half the apical width.
MALE—Answers quite fully to description of female, but scutellum either red or black; pygidial plate quite broadly rounded, margin carinate, median length about equal to basal width, surface rather smooth but with some inconspicuous, suberect pubescence.
DISTRIBUTION — Minnesota to Nova Scotia, south to Texas and North Carolina; June (in Texas) to September.
FLOWER RECORDS—Baccharis, Bidens and Solidago.