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 8 mm.; black; face slightly shorter than distance between eyes above; eyes subparallel; cheeks slightly narrower than eyes; lower half of clypeus, an apical spot on process of labrum, basal spots on mandibles, and small lateral facial maculae creamy yellow, the spot on clypeus interrupted above by the intrusion of black medially, lateral maculae not extending above upper margin of clypeus; process of labrum somewhat broader than long, rounded apically; facial foveae very shallow and obscure, rather broad, terminated slightly above level of antennae; space between margin of vertex and lateral ocelli about half the distance between them; flagellum obscurely reddened beneath, median segments about as broad as long; face shining, area between ocelli and antennae doubly punctate, the fine punctures exceedingly minute and quite close, with much coarser, more shallow and sparse punctures superimposed upon this field, cheeks and area between eyes and ocelli shining and almost impunctate, punctures below antennae somewhat more coarse and deep, well separated on black areas, very sparse and obscure on maculated areas; pubescence of head and thorax rather dense but not hiding surface, elongate on vertex and dorsum of thorax, where it is mostly yellow, becoming more whitish below; tubercles and tegulae dark; wings subhyaline, quite strongly violaceous, veins and stigma brownish-testaceous; recurrent veins entering 2nd submarginal cell subequally distant from base and apex; legs dark, but front tibiae with a small, basal, yellow spot, spurs testaceous; dorsum of thorax shining, punctures of scutum quite deep and distinct, rather close anteriorly, becoming very sparse posteriorly and on scutellum, pleura shining, with coarse, deep, distinct, well separated punctures; apical margins of abdominal terga rather evenly depressed, these areas becoming yellowish-hyaline toward rims, very minutely and rather sparsely punctate, discs of terga shining, that of the 1st almost impunctate, but 2nd and following terga rather closely, deeply and distinctly, although finely, punctate; apical margins of abdominal terga with rather obscure, whitish, apical fasciae, interrupted to some degree medially on the more basal segments, discal pubescence very short, thin and obscure, more fuscous, tergum 5 with a quite pronounced, apical, brownish fimbria.
MALE—Length 7 mm.; black; length of face slightly shorter than distance between eyes above; eyes somewhat convergent below; cheeks much narrower than eyes; clypeus except the very narrow upper border, apical half of process of labrum, base of mandibles, and lateral facial maculae yellow, the maculae extending up inner margin of eye slightly beyond level of antennae, acute above; process of labrum considerably broader than long, broadly rounded apically; facial foveae very shallow and obscure, barely visible; space between margin of vertex and lateral ocelli very slightly less than distance between them; flagellum dull reddish, median segments nearly as broad as long; space between antennae and ocelli dull, punctures very fine and close, subrugose, becoming rather sparse and irregular between eyes and ocelli, minute and well separated on the shining cheeks, blackened areas below antennae quite closely, finely and deeply punctate, the punctures becoming quite coarse but rather obscure on clypeus, the lateral maculae finely but obscurely punctate; pubescence of head and thorax yellowish above, more whitish below, rather long and dense but not hiding surface; tubercles and tegulae dark; wings subhyaline, rather strongly violaceous, veins and stigma brownish-testaceous; recurrent veins entering 2nd submarginal cell subequally distant from base and apex; tarsi dull testaceous, spurs yellowish, legs otherwise dark except for a yellow anterior stripe on front tibiae, and basal yellow spots on front and mid tibiae; dorsum of thorax shining, punctures deep and distinct, rather coarse, quite close on scutum anteriorly, becoming very sparse in center posteriorly and on scutellum, pleura shining, with deep, coarse, well separated punctures; apical margins of abdominal terga rather broadly depressed, these areas becoming reddish-hyaline along rims, rather smooth, with only microscopic punctures, discs of the terga shining, with rather deep and distinct but fine punctures, these well separated on basal tergum but close on the others; apical margins of abdominal terga with thin, obscure, pale yellowish, apical fasciae, the discal pubescence very short but very dense, not at all hiding the surface, brownish in color; sternum 6 broadly incurved apically, the median portion of this produced into a bibbed process, each lobe bearing a small pencil of short, fine setae; sternum 7 strongly, transversely bowed, the apical margin medially produced into a bibbed process, the 2 lobes rather slender, narrowly rounded apically, separated by a deep emargination, the outer margins fringed with very short, inconspicuous setae; apical process of sternum 8 originating at center of broad basal part, very slender toward base, gradually expanded toward tip which is prolonged into an acute projection; penis valves robust, strongly compressed, the tips abruptly flexed ventrally, completely bare; gonocoxites forming a broad basal shield, the outer angle of which is slightly produced, gonostyli entirely inevident.
DISTRIBUTION—Colorado and North Dakota, east to Illinois, Wisconsin and Michigan, June to August.
FLOWER RECORDS—Robertson (1922 & 1929) records this on three species of Verbena, V. hastata, V. stricta and V. urticaefolia.