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.; entirely black; face much longer than distance between eyes; eyes subparallel; lateral ocelli subequally distant from margin of vertex and each other, slightly more distant from eyes; clypeus fully twice as broad as its median length, somewhat sloping medially, margin slightly protuberant at each extreme side; mandibles narrow and elongate, 3-dentate, with a narrow, median, apical protuberance; wings subhyaline basally, becoming lightly infuscated apically, stigma piceous, veins more brownishtestaceous; tegulae smooth and shining, testaceous-hyaline; legs entirely black, basitarsis slender, spurs testaceous; pubescence uniformly very short and thin, entirely pale, scopa yellowish-white; punctures rather fine but deep and distinct, quite close over most of head and on scutum anteriorly, becoming somewhat more widely separated on scutum posteriorly and on scutellum, well separated but hardly sparse on pleura, close and rather coarse on the more basal, abdominal terga, well separated medially but close laterally on terga 2-4, much finer and quite close on 5 and 6, apical margins not appreciably depressed and only very narrowly impunctate and somewhat yellowish; abdominal sterna quite coarsely and closely punctate beneath the scopal hairs, apical margins yellowish-hyaline.
MALE—Length 6-7 mm.; entirely black; face considerably longer than distance between eyes above; eyes very slightly convergent below; lateral ocelli subequally distant from eyes and each other and to margin of vertex; median length of clypeus somewhat greater than half the maximum width, somewhat thickened apically, margin above this gently bowed; labrum only slightly longer than broad, apical margin not protuberant; mandibles slender but rather short, hi-dentate; cheeks subequal to eyes in width; wings subhyaline basally, becoming lightly infuseated apically, stigma piceous, veins more brownishtestaceous to piceous; tegulae smooth and shin- ing, testaceous-hyaline; legs entirely black, spurs brownish-testaceous; apex of abdomen curved ventrally, tergum 7 triangularly emarginate medially between a pair of triangular projections, lateral margins obtusely angulate; sterna 1-4 exposed, black, surface shining between rather coarse but shallow punctures, 2 and 3 somewhat swollen across center, apical margins depressed, yellowish-hyaline, 4 with a broadly V-shaped thickening beyond which the margin is testaceous-hyaline, 5-8 retracted, 5 transverse, apical margin broadly yellowishhyaline and slightly incurved, 6 broadly out- curved, the margin more narrowly yellowishhyaline, 7 and 8 retracted, as shown (fig. 16); genital armature as shown.
DISTRIBUTION — Illinois and Michigan to Connecticut, south to Georgia, March to July.
FLOWER RECORDS — Ilex, Philadelphus and Rubus. Robertson (1929) records this species on the following additional genera: Capsella, Crataegus, Ellisia, Geranium and Hydrophyllum.