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 7 mm.; black; face considerably longer than distance between eyes; eyes subparallel; cheeks considerably narrower than eyes; a spot on supraclypeal area, a narrow, median line on clypeus, and lateral facial maculae yellow, the lateral maculae obliquely truncate above at level of antennae; process of labrum somewhat broader than long, apical margin broadly rounded; facial foveae quite distinct, slightly broadened toward lower end, but this abruptly narrowed, terminating slightly above level of antennae; space between margin of vertex and lateral ocelli subequal to distance between them; flagellum becoming pale ferruginous apically, median segments about as broad as long; face shining, punctures between antennae and ocelli close, deep and distinct, rather fine, becoming rather sparse, irregular and obscure on vertex laterally, minute and quite sparse on the shining cheeks, very sparse and obscure below antennae but quite coarse and deep on clypeus; pubescence of head and thorax rather long and copious but not hiding surface, dark on dorsum of thorax and vertex, pale on thorax laterally and beneath, on upper portion of face and cheeks, with a few coarse, erect, dark hairs on clypeus; tubercles and an interrupted marginal line on pronotum yellow; tegulae fuscous; wings subhyaline, veins and stigma brownish; 1st recurrent vein entering 2nd submarginal cell very slightly nearer base than 2nd does to apex; legs dark except for a small, basal, testaceous spot on front and mid tibiae; spurs ferruginous; dorsum of thorax shining, punctures of scutum very fine but deep and distinct, very close and exceedingly fine on scutum anteriorly, becoming slightly more widely separated and coarse posteriorly and on scutellum, pleura less shining, punctures rather coarse but shallow and rather sparse; apical margins of abdominal terga rather narrowly depressed, rather deeply so laterally, more or less hyaline, occupied by rather dense, pale, apical, pubescent fasciae these somewhat interrupted on the more basal segments, discs of the terga with very fine and close punctures, these becoming obscure on the more apical segments, discal pubescence very short, but rather dense, fuscous, longer and more erect on tergum 5 where a quite dense, fuscous, apical fimbria is formed.
MALE—Length 6 mm.; black; length of face subequal to distance between eyes above; eyes slightly convergent below; cheeks much narrower than eyes; labrum, mandibles, scape and entire face below a transverse line slightly above antennae, entirely yellow; process of labrum somewhat broader than long, apical margin broadly rounded; facial foveae narrow and somewhat elongate, quite obscure, terminated at margin of facial maculation; space between margin of vertex and lateral ocelli subequal to distance between them; flagellum largely yellow, median segments about as broad as long; puncturation of face between antennae and ocelli very close, minute and obscure, becoming very sparse and minute on vertex laterally, and on the shining cheeks where they are somewhat closer, those on maculated areas hardly evident; pubescence of head and thorax rather long and erect, somewhat dense, yellowish in large part; tubercles and an interrupted marginal line on pronotum yellow; tegulae fuscous, with an anterior yellow spot; wings subhyaline, somewhat clouded apically, strongly violaceous, veins and stigma brownish, 1st recurrent vein entering 2nd submarginal cell slightly nearer base than 2nd does to apex; legs, including even coxae and spurs, entirely yellow; dorsum of thorax shining, quite deeply and distinctly but very closely punctate, punctures on scutum anteriorly becoming minute and crowded, pleura somewhat shining, punctures very fine and quite sparse; apical margins of abdominal terga rather broadly depressed, quite deeply so laterally, with thin, whitish, apical, pubescent fasciae, these slightly interrupted on the more basal segments, discs of terga very closely and finely but quite distinctly punctate, punctures becoming more minute, close and obscure on the more apical segments, discal pubescence very short and rather dense, fuscous, not at all hiding surface; sternum 5 produced medially into an elongate, spine-like process which bears a tuft of short setae at tip; apical margin of sternum 6 produced into a pair of elongate, widely separated and compressed spine-like processes which are acute apically; sternum 7 subtriangular medially, with a bibbed process on each side at base; apical portion of sternum 8 broadly dilated, but this portion about twice as long as broad, subparallel laterally, apex very slightly incurved and rather densely pubescent beneath; gonocoxites subtriangular, rather narrowly rounded apically, penis valves very broad, prolonged medially into a sharply pointed tip with a narrow lateral process; gonostyli inevident.
DISTRIBUTION—Generally distributed over the entire Eastern United States and Southern Canada, ranging west to Texas, Colorado and North Dakota; April to September.
FLOWER RECORDS—This species is a common visitor to a wide range of host plants which include Asclepias, Castanea, Ceanothus, Chrysanthemum, Coreopsis, Erigeron, Oenothera, Oxalis, Pentstemon, Rubus and Trifolium. Roberston (1929) records it from the following additional genera: Ammannia, Amorpha, Aster, Bidens, Blephilia, Cryptotaenia, Desmodium, Dianthera, Eryngium, Gerardia, Geum, Gillenia, Hedeoma, Houstonia, Iysanthes, Lespedeza, Lippia, Lycopus, Lythrum, Malva, Melilotus, Nepeta, Polygala, Polygonum, Portulaca, Potentilla, Prunella, Psoralea, Pycnanthemum, Rudbeckia, Spiranthes, Stachys, Strophostyles, Stylosanthes, Verbena and Verbesina.