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 11 mm.; deep blue; face considerably longer than distance between eyes above; eyes slightly convergent below; lateral ocelli subequally distant from eyes and margin of vertex, much nearer to each other; clypeus broadly convex, considerably produced apically, median area of margin nearly straight, narrowly shining and impunctate; labrum very slightly longer than basal width; mandibles obscurely 4-dentate, shown (fig. 32); cheeks somewhat broader than eyes; wings lightly infuscated, 2nd recurrent vein reaching 2nd submarginal cell much nearer apex than 1st does to base; tarsal segments of legs simple and unmodified, mid and hind spurs piceous; pubescence largely fuscous and quite dense on clypeus, becoming whitish between antennae and eyes but with intermixed light and dark hairs around ocelli and on vertex; scutum with largely pale pubescence, but with scattered, erect, fuscous hairs, that on pleura, scutellum and propodeum entirely yellowish-white; pubescence of legs largely pale basally, but becoming fuscous on the more apical segments; basal abdominal tergum with elongate, whitish pubescence, this becoming shorter on the following terga, pale on 2, fuscous and erect on 3-5, 6 with subappressed, thin tomentum which does not obscure the surface; scopa entirely black; punctures deep, distinct and rather close in general, slightly separated behind ocelli, but deep and distinct, becoming quite closely crowded and finer on face below, especially on clypeus, fine, close and rather shallow on cheeks below; densely crowded over much of scutum but becoming slightly separated in center of disc posteriorly, slightly separated, in part, on scutellum, pleura dull with shallow and contiguous punctures; lateral faces of propodeum somewhat shining, but rather minutely roughened, posterior face becoming rather densely tessellate and with minute and obscure punctures, dorsal area velvety, becoming very obscurely and narrowly substriate along upper margin; abdominal terga more shining, punctures fine, quite close but distinctly separated in center of terga 1-6, becoming very close at extreme sides, minute and densely crowded on 6, apical margins narrowly depressed, shining and impunctate.
MALE — Length 8-9 mm.; almost brassy green on head and thorax dorsally, but otherwise more bluish; face considerably longer than distance between eyes above; eyes somewhat convergent below; lateral ocelli subequally distant from margin of vertex and each other, somewhat more distant from eyes; clypeus rather strongly convex, somewhat produced apically, median area of margin narrowly shining and impunctate; mandibles bidentate; cheeks very slightly broader than eyes; wings very lightly infuscated, 2nd recurrent vein reaching 2nd submarginal cell much nearer apex than 1st does to base; tarsal segments slender and simple, anterior margin of hind basitarsus without a median tubercle; mid and hind spurs piceous; pubescence entirely pale on head and thorax, yellowish-white above and on front of face, somewhat more whitish on cheeks, pleura and legs; quite copious and elongate on face, cheeks and dorsum of thorax; pubescence of abdominal terga very thin and obscure, suberect, entirely pale; punctures deep and distinct, rather close and coarse in general, rather coarse and distinct on vertex and upper part of face, becoming contiguous below ocelli, very fine and densely crowded below antennae and on clypeus, becoming somewhat more shallow and indefinite but very close on cheeks, punctures close and distinct over most of scutum, becoming slightly separated only in center of disc, those on scutellum more definitely but not widely separated, somewhat more coarse than on scutum; pleura rather dull, punctures rather shallow, but subcontiguous; lateral faces of propodeum dull, very finely roughened, posterior face becoming more densely tessellate, dorsal area very finely roughened or substriate in large part; abdominal terga shining, punctures quite deep and distinct, rather close and uniform in general, becoming somewhat more shallow and indistinct on the more apical terga, those on 6 becoming rather obscure apically; margins of all terga narrowly impressed, shining and impunctate; tergum 6 with a median, rounded, apical emargination, 7 broad and rather short, with a quite deep, median, emargination, more or less angulate on each side; sternum 2 rather broadly outcurved, covering in large part the following sterna, 3 with a rather deep, triangular, median emargination which is fringed with rather short, non-converging hairs (fig. 33), median third of 4 somewhat produced apically, quite densely, elongate setose on each side of a median, non-setose, depressed line (fig. 34); sterna 5-8 entirely retracted, median area of 6 rather broadly produced medially; genital armature as shown (fig. 35).
DISTRIBUTION — Minnesota to Maine, south to Illinois and North Carolina, April to August.
FLOWER RECORDS — Cercis, Claytonia, Geranium, Lupinus, Pedicularis, Rubus, Trifolium, Vicia and Viola. Additional records by Robertson (1929) include Astragalus, Cardamine, Collinsia, Dicentra, Erythronium, Nepeta and Pentstemon.