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 5.5-8 mm.; lateral ocelli nearer margin of vertex than to each other; cheeks considerably narrower than eyes, posterior margin not carinate; longer side of basal segment of flagellum considerably shorter than segment 2, median segments considerably longer than broad; mandibles simple; wings hyaline basally, becoming lightly infuscated along apical margin and marginal cell, with the usual three submarginal cells, 2nd usually somewhat broader than 3rd anteriorly, veins testaceous to piceous, basal vein much basad of transverse median; tegulae shining between exceedingly minute and inconspicuous punctures, these rather close along inner margin, very sparse toward outer margin; posterior margin of scutellum deeply depressed medially; front coxae not spinose; apex of hind tibiae with 2 or 3 elongate, hair-like, yellowish bristles; head testaceous in large part, with a limited area of black between antennae, between the ocelli, and over posterior half of cheeks; antennae testaceous; thorax somewhat more reddish, tubercles and tegulae yellowish-testaceous, scutum with a median black line, metapleura black, mesopleura with blackened areas below; legs largely testaceous, femora more or less darkened basally, hind tibiae and tarsi somewhat darkened, all spurs pale yellow; abdominal terga reddish-testaceous, 2 and 3 with lateral, widely separated, yellow maculations, the broad, impressed, apical margins becoming more or less yellowish-hyaline; abdominal sterna largely testaceous; vertex, cheeks above, upper part of face and lateral areas below antennae very coarsely, deeply and closely punctate, cheeks much more finely punctate below, the supraclypeal area and clypeus very finely and closely so; scutum, scutellum and mesopeura very densely rugose, punctures becoming somewhat more distinct on mesopleura below, posterior face of propodeum more finely or shallowly rugose, lateral faces becoming somewhat smoother below, triangle smooth and somewhat shining below, becoming irregularly and rather coarsely striate along upper margin; discs of abdominal terga very finely and rather closely punctate toward base; punctures becoming somewhat more widely separated toward the broad, impressed, apical margins which are to some degree invaded by exceedingly minute and sparse punctures, tergum 1 impunctate laterally and basally, median punctures very minute, and tergum 5 becoming very sparsely and finely punctate apically; pseudopygidium very short, transverse, forming the rather short, truncate, apical margin of tergum 5, densely covered with suberect, silvery tomentum; pubescence very short and thin, entirely white, somewhat more copious on face, cheeks and propodeum, hardly evident on abdomen dorsally, becoming somewhat more conspicuous apically, apex of sternum 5 with a small tuft of elongate, convergent, fuscous hairs on each side of mid-line.
MALE—Length 5.5-7 mm.; lateral ocelli nearer margin of vertex than to each other; cheeks considerably narrower than eyes, posterior margin subcarinate; antennal scape only slightly swollen, apex deeply excavated, completely enclosing pedicel, longer side of basal segment of flagellum considerably shorter than segment 2, median segments slightly longer than broad; mandibles slender and simple apically; wings hyaline, faintly infuscated apically, with the usual three submarginal cells, 2nd somewhat broader than 3rd anteriorly, veins and stigma testaceous, basal vein much basad of transverse median; tegulae shining between very fine and rather sparse punctures; posterior margin of scutellum only slightly grooved medially; front coxae not spinose; hind femora slender and unmodified; clypeus, labrum, mandibles, a very narrow line below eye at base of mandibles, narrow lateral facial maculae ending narrowly on eye margin at level of antennae, and antennal scape, bright yellow; face, vertex and cheeks otherwise black; antennal flagellum brownish-testaceous; tubercles and tegulae yellowish-testaceous, thorax otherwise entirely black; legs testaceous in large part, mid and hind femora more or less blackened, spurs pale yellow; abdominal terga reddish in large part, but 2 and 3 with broad, basal, transverse maculations which are very slightly interrupted medially, forming nearly complete bands, 3-5 often with more obscure, sub- median or apical, yellow maculations; tergum 1 piceous across base, yellowish-ferruginous medially, forming a vague, transverse band, reddish apically; broad apical margins of following terga becoming yellowish-hyaline; vertex, face above antennae and upper part of cheeks very coarsely and deeply rugoso-punctate, cheeks much more finely so below; supraclypeal area and clypeus very minutely and rather vaguely punctate, the dark lateral areas with coarser, close punctures, but these very sparse on maculated areas; scutum, scutellum and mesopleura coarsely rugose, scutellum and propodeum rather finely so, triangle dull and densely tessellate below, becoming rather coarsely rugoso-striate along upper margin; discs of abdominal terga very finely and rather closely punctate basally, punctures becoming more minute and widely separated toward the depressed apical margins, these invaded in part by exceedingly minute, vague punctures; pubescence entirely whitish, short but rather copious over head and thorax, very fine and sparse on abdomen dorsally, finer and more elongate on the sterna, becoming more copious apically, sternum 6 with considerable dense, suberect, pale pubescence apically; median length of pygidial plate about equal to basal width, rather strongly narrowed apically, apex deeply incised, margins carinate, surface very fine and closely punctate; exposed sternal plates unmodified, sternum 6 strongly narrowed to the narrowly rounded apex; sternum 8 with a slender apical process; gonocoxites of genital armature as shown (fig. 107).
DISTRIBUTION—Minnesota to Quebec and Maine, south to Georgia, March to June.
FLOWER RECORDS — Amelanchier, Claytonia, Crataegus, Malus, Pyracantha, Salix, Senecio and Stellaria. Robertson (1929) records sayi on Antennaria, Cercis, Chaerophyllum, Collinsia, Dentaria, Isopyrum, Nothoscordum, Osmorrhiza, Ranunculus, Ribes, Rubus, Thaspium, Viburnum, Viola, Zanthoxylum and Zizia.
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