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 6 mm.; black; length of face subequal to distance between eyes above; eyes subparallel; cheeks slightly narrower than eyes; process of labrum about as long as its basal width, quite strongly constricted to the truncate tip; facial foveae very shallow, rather obscure, terminating about at level of antennae; space between margin of vertex and lateral ocelli not much exceeding their diameter; median segments of flagellum somewhat broader than long; punctures of face fine and very close between antennae and ocelli, becoming slightly coarser and more definitely separated on vertex laterally, fine and sparse on supraclypeal area, becoming coarse and somewhat closer on face laterally and on clypeus, punctures of cheeks fine and close, but deep and distinct; pubescence of head and thorax short, entirely pale yellowish, rather dense on dorsum of thorax but not hiding surface; tubercles obscurely reddened; tegulae yellowish-hyaline; wings subhyaline, veins testaceous, stigma somewhat more brownish, 2nd recurrent vein entering 2nd submarginal cell much nearer apex than 1st does to base; legs mainly dark, but front and mid tibiae with a small, basal, yellow spot, and hind tarsi yellowish; spurs yellow; dorsum of thorax shining, minutely punctate, punctures rather close along extreme anterior margin of scutum, becoming more widely separated but not sparse in center of disc, those on scutellum slightly coarser and quite sparse; upper portions of pleura shining, finely punctate, punctures well separated but hardly sparse, area just below this much more coarsely and closely punctate, becoming fine, close and irregular beneath; apical margins of abdominal terga broadly and rather shallowly depressed, these areas shining and impunctate, obscurely reddened, disc of tergum 1 shining, very minutely and sparsely punctate, the punctures barely evident with high magnification, disc of 2nd and following terga rather closely and minutely punctate basally, becoming quite sparsely punctate toward apical rims, discal pubescence very short, thin and obscure, entirely pale, tergum 5 with a rather dense, pale brownish, apical fimbria.
MALE—Length 5.5 mm.; black to piceous; length of face very slightly longer than distance between eyes above; eyes slightly convergent below; clypeus, except for apical margins laterally, labrum, mandibles, a small spot on supraclypeal area, and triangular lateral maculae, yellow, the lateral maculae extending slightly above upper margin of clypeus, but not reaching level of antennae; cheeks much narrower than eyes; process of labrum slightly broader than long, only slightly narrowed apically, apex very slightly emarginate medially; facial foveae small but distinct, rather narrow; lateral ocelli slightly nearer margin of vertex than to each other; median segments of flagellum considerably longer than broad; punctures of face between antennae and ocelli very close and rather fine, becoming quite sparse on vertex laterally and very sparse on lower half of face, cheeks shining, finely punctate, punctures well separated, becoming quite sparse below; pubescence of head and thorax short, entirely yellowish, rather dense on dorsum of thorax but not hiding surface; tubercles yellow; tegulae yellowish-hyaline; wings subhyaline, veins pale testaceous, stigma somewhat more brownish; 2nd recurrent vein entering 2nd submarginal cell considerably nearer apex than 1st does to base; tarsi and spurs yellow; femora dark but with the tip narrowly yellow, front tibiae yellow anteriorly, more ferruginous on outer surface, mid and hind tibiae dark with yellow base and apex; dorsum of thorax shining, punctures of scutum deep and distinct, rather close and fine anteriorly, becoming slightly deeper and more sparse in center of disc posteriorly, punctures of scutellum slightly coarser, rather sparse on each side of middle; pleura shining, finely and quite sparsely punctate above, becoming somewhat more coarsely and closely punctate below; apical margins of abdominal terga rather narrowly and deeply depressed, these areas somewhat reddened, disc of tergum 1 shining, deeply, distinctly and rather finely punctate, the punctures close basally, becoming very sparse toward the depressed rim, terga 2, 3 and 4 very finely subrugose, and somewhat depressed basally, a more elevated median portion becoming finely and closely punctate, punctures becoming sparse along narrow, apical area just before the depressed rim, discal pubescence very short, thin and obscure, entirely pale; sternum 6 with a very narrow and deep median emargination; wings of sternum 7 quite evenly ovoid, the tips rounded and lacking setae; apical portion of sternum 8 rather narrow, parallel-sided, tip slightly flexed and bearing an obscure tuft of very short and fine setae; gonostyli very slender and short compared to the gonocoxites, nearly straight except for the abruptly flexed apex, with a fine pencil of rather elongate, subapical setae; penis valves about equal in length to gonostyli, acute apically, rather broad toward base.
DISTRIBUTION—Illinois and Wisconsin; autumnal.
FLOWER RECORDS—Aster and Solidago. Robertson (1929) records this on Bidens aristosa, Helianthus divaricatus, Rudbeckia hirta, R. laciniata, R. subtomentosa and .R. triloba.