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.; blue-green; face considerably longer than distance between eyes above; eyes very slightly convergent below; lateral ocelli subequally distant from eyes, from posterior margin of vertex and from each other; clypeus broadly convex and quite broadly produced apically, the wide, median area nearly straight; median length of labrum about equal to basal width; dentition of mandible as shown (fig. 32) ; cheeks considerably broader than eyes; wings subhyaline, becoming faintly infuscated apically, 2nd recurrent vein reaching 2nd submarginal cell much nearer apex than 1st does to base; tarsal segments simple and unmodified, mid and hind spurs piceous; pubescence, including scopa, entirely pale, rather short and thin but somewhat more copious around antennae, on cheeks below, around wing bases, on propodeum and basal abdominal tergum, very short on discs of the following terga, becoming subappressed on tergum 6; punctures rather fine and close but deep and distinct over most of head and thorax, densely crowded on face and clypeus, on cheeks and pleura, slightly separated in center of scutum but otherwise contiguous, and contiguous in large part on scutellum; lateral and posterior faces of propodeum somewhat shining but with minute, densely crowded, shallow punctures, dorsal area velvety, becoming finely striate along upper margin; abdominal terga shining, punctures finer and distinctly separated on 1-3 medially, but these becoming closely punctate at sides, 4 and 5 uniformly, closely punctate, and 6 minutely and densely punctate, apical margins of all only slightly depressed, apical rims narrowly shining and impunctate.
MALE — Length 9-10 mm.; head and thorax dark olive-green, abdomen more bluish- green; face considerably longer than distance between eyes above; eyes somewhat convergent below; lateral ocelli subequally distant from eyes and each other, slightly nearer margin of vertex; clypeus very slightly convex, considerably produced apically, median area nearly straight but finely crenulate, margin narrowly shining and impunctate; median length of labrum about equal to basal width; mandibles distinctly bidentate; cheeks subequal to eyes in width; wings subhyaline, 2nd recurrent vein reaching 2nd submarginal cell somewhat nearer apex than 1st does to base; tarsal segments simple and unmodified, anterior margin of hind basitarsus with a very small tubercle near apical third, mid and hind spurs piceous; pubescence entirely white, dense around antennae, over lower portion of face and on cheeks below, quite copious over most of thorax and on basal abdominal tergum, shorter but erect on the following terga; punctures fine and densely crowded over most of head and thorax, but becoming somewhat more coarse and distinct on scutellum, very shallow and indistinct on lateral and posterior faces of propodeum, dorsal area velvety, becoming very finely and irregularly striate along upper margin; abdominal terga shining, punctures fine and definitely but not widely separated medially, becoming somewhat coarser and closer toward sides, terga 4-6 more uniformly finely and closely punctate, 6 becoming impunctate along the brownish apical margin, this broadly and shallowly emarginate medially, 7 narrowly produced medially, with a deep, semicircular emargination, the two resulting projections slender and acute; sternum 2 broadly rounded apically, covering 3 and most of 4, apical margin of 3 with a quite deep, triangular, median emargination which is largely filled with elongate, converging setae (fig. 33), 4 rather broadly outcurved apically, median area rather finely setose, and with a very fine, median, impunctate line, the margin not thickened; sterna 5-8 entirely retracted, submembranous, 8 broadly triangular apically; genital armature much as in collinsiae (fig. 35), but pubescence not quite as elongate.
DISTRIBUTION — North Dakota, Colorado and New Mexico, east to Ohio, March to June.
FLOWER RECORDS — Salvia and Verbena. This is recorded by Robertson (1929) on Aesculus, Cardamine, Lithospermum, Pentstemon, Phlox, Rubus and Trifolium.
This species has been reared from cells of Scelifron caernentarium.