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. The distinguishing features that separate E.
ˇnf erruptus from all other Epeolus in North America include the
presence of a blunt median process on the metanotum, which
is partially if not entirely obscured by tomentum, and the very
wide discal patch of TI uniquely forming a rounded triangle with
concave lateral sides. Other defining attributes include the
following in combination: F2 of female antenna noticeably
longer than wide; mesoscutum with paramedian band; axilla
with tip inconspicuous, and axilla rather small and tip not
extending beyond midlength of mesoscutellum; and T1—T4 with
basal and apical fasciae interrupted medially.
Distribution in Canada: Central to Western Canada, east of
the Rocky Mountains (Map 8).
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 8 mm.; black, basal segments of antennae, mandibles, tubercles, tegulae, and legs, in large part testaceous; segments of flagellum beyond the first slightly longer than broad, more brownish below, piceous above; lateral ocelli separated from margin of vertex by a space slightly greater than their diameter; cheeks about half width of eyes, posterior margin obscurely carinate below, rounded above; median length of labrum about half the breadth, with a pair of very minute, apical denticles, with a low sub- median transverse ridge which is slightly interrupted medially; inner margin of mandible with a distinct, subapical angle or tooth; scutellum somewhat outcurved, with a rather deep median impression, axillae broadly united to lateral margins, only very slightly protuberant, tips hardly reaching mid transverse line of scutellum (fig. 110); wings with the usual three submarginal cells, lightly infuscated, veins brownish-testaceous; face with some dense, whitish tomentum around bases of antennae, but clypeus and other areas of head largely bare; venter of thorax with some dense, white tomentum, but lateral surfaces of pleura largely bare below, upper part quite densely whitish tomentose; margin of pronotum quite densely pale yellowish tomentose, continuing as a fringe of short hairs around tubercles; scutum with a pair of very narrow, longitudinal lines of yellowish tomentum on each side of mid-line anteriorly, the scutello-mesothracic suture very narrowly yellowish tomentose; metanotum with a rather dense tuft of pale tomentum near mid-line, bare on each side, adjacent margin of scutellum narrowly whitish fasciate from one extreme side to the other, lateral, dorsal areas of posterior face of propodeum with a dense, whitish tomentose patch; anterior face of basal abdominal tergum with a triangular, yellowish, tomentose patch on each side, this distinctly separated from an apical tomentose fascia which is rather widely interrupted medially and quite strongly constricted on each side, becoming broadened laterally, the resulting dark patch more or less triangular, covered with thin but dense black tomentum; terga 2-4 with apical tomentose fasciae which are interrupted medially, slightly constricted on each side and broadened again toward extreme lateral margins, slightly separated from rims; tergum 5 with a rather large patch of whitish tomentum on each side toward apical margin; punctures of head deep and distinct, rather close in general but somewhat separated and rather coarse below antennae toward eyes, becoming closer on vertex and cheeks, fine and distinct on clypeus, more minute on lateral areas of face below; scutum and scutellum rather uniformly densely rugoso-punctate throughout, punctures of axillae somewhat more coarse and distinct; pleura very densely rugose above, with rather coarse punctures over lower half which are to some degree separated, interspaces shining; discs of abdominal terga very finely, closely and uniformly punctate throughout; tegulae very finely, closely and distinctly punctate anteriorly, punctures becoming more minute and obscure posteriorly; pseudopygidium transverse and extremely short, barely evident.
MALE—Agrees with description of female in general, but segments of flagellum slightly broader than long, tegulae more fully punctate posteriorly, thoracic punctures in general somewhat coarser; pygidial plate about as long as basal width, marginal carina distinct, broadly rounded apically, surface with rather obscure but close punctures, bearing suberect, short hairs.
DISTRIBUTION — Texas, Illinois and Michigan to Georgia and New Jersey; April to July.
and Trifolium. Recorded by Robertson (1929) on Coreopsis. Krigia, Psoralea and Ruddbeckia.