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.; head and thorax green, abdomen piceous, maculae yellow; face slightly longer than distance between eyes; eyes subparallel; cheeks subequal to eyes in width; vertex rather broad, lateral ocelli slightly nearer its hind margin than to eyes; foveae short, very narrow, rather shallow and obscure; mandibles yellow, becoming ferruginous at tip; labrum mostly yellow, but with a small, median, dark spot; clypeus yellow but with a pair of triangular, basal, dark spots, supraclypeal area yellow; lateral face marks yellow, upper end obliquely truncate on inner margin of eye slightly above level of antennae; scape yellow anteriorly, narrowly piceous posteriorly, flagellum yellowish beneath, somewhat darker above; face and cheeks shining below, punctures rather sparse, shallow and obscure, upper part of face densely tessellate, punctures exceedingly minute and barely visible; pubescence of head and thorax short, thin, entirely whitish; posterior margin of pronotum with a pair of narrow, yellow maculae, these continuous with the yellow tubercles, thorax otherwise brassy green; tegulae yellowish-hyaline; wings subhyaline, veins and stigma pale yellowish 3 stigma margined with darker brown; legs dark, femora narrowly yellowish apically, front and mid tibiae yellow anteriorly, front tarsi yellow, mid and hind tarsi dark; scutum and scutellum dull and tessellate, with rather sparse and exceedingly minute and obscure punctures; pleura above dull, more shining below, punctures about as those of scutum; abdominal terga 1-5 with broad, transverse, basal, yellow maculae, these sub-interrupted medially, discs of the terga somewhat shining, punctures indistinct basally, the more apical terga becoming somewhat more distinctly and closely punctate.
MALE—Length 6 mm.; head and thorax green, abdomen piceous, with greenish reflections, maculae yellow; length of face greater than distance between eyes; eyes subparallel; cheeks subequal to eyes; somewhat swollen behind; vertex broad, lateral ocelli subequally distant from eyes and its hind margin; foveae very small, shallow and obscure, mandibles yellow, becoming ferruginous at extreme tips; labrum, clypeus., entire face below a line slightly above antennae, and- lower outer orbits and cheeks bright yellow; scape bright yellow, with only a very small dark spot toward apex posteriorly, flagellum yellow beneath, becoming brownish above; face and cheeks below shining, punctures very shallow and obscure, upper portion of face and vertex dull tessellate, punctures hardly visible; pubescence of head and thorax very short, thin, entirely white; posterior margin of pronotum with a pair of yellow maculae which extend onto and include the tubercles, thorax otherwise brassy green; tegulae yellowish-hyaline; wings subhyaline, veins and stigma yellowish, stigma margined with testaceous; front and middle legs yellow, but posterior surface of their femora and tibiae in large part piceous, hind trochanters, coxae apically, a narrow line on upper margin of hind femora, and base of tibiae yellow, hind legs otherwise dark; scutum and scutellum densely tessellate, punctures exceedingly minute and obscure, quite sparse; pleura dull above, becoming somewhat more shining below, punctured about as scutum; abdominal terga 1-4 with basal, transverse maculae which are interrupted only on the basal tergum, discs of the terga somewhat shining, punctures exceedingly minute, sparse and obscure, clearly evident only on the more apical segments; apical margin of sternum 6 broadly emarginate; sternum 7 with a pair of acute, lateral projections, delimiting a broad and deep, rectangular, apical emargination; apical portion of sternum 8 subtriangular in form, apex very narrowly rounded; gonostyli slender, rounded apically, slightly exceeded in length by the slender penis valves, these slightly angulate laterally, cuspis and digitus of volsellae distinct, rather slender, about equal in length, terminating at lateral angles of penis valves, gonocoxites somewhat produced apically to form short, rounded lobes.
DISTRIBUTION—Alberta to Michigan, Illinois and New York; July and August.
FLOWER RECORD—The type material of this species was collected on Solidago rigida.
The following two descriptions have been received from P. H. Timberlake: