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Identification Summary: Pits on T2 run at about the same density from the base to the rim of the segment, pits on the depressed rim often slightly smaller is diameter; Scutum color usually, but not always, a golden green color; Striations on the propodeal triangle simple, largely unbranched, relatively thick, relatively tall, those in the center going about 75 percent of the way to the rim; Appressed hairs are tan or off-white rather than bright white; T1 hair fan usually fairly wide open at the top and the fan itself on the less dense side of things; Never has pits on the mesepisturnum; In direct comparison one of the largest of the metallic Lasioglossums; Many species have similarities to L. rohweri, but most are slightly smaller and have relatively low pit densities on the depressed rim of T2
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 olive green, abdomen more piceous, but with strong, greenish or bronzy reflections; pubescence short, thin, entirely pale; head considerably broader than long; clypeus broadly convex, projecting about one-half below suborbital line; supraclypeal area considerably broader than long, shorter than clypeus; eyes convergent below; lateral ocelli subequally distant from eyes and each other; cheeks sub- equal to eyes in width; face below ocelli rather dull, punctures deep and distinct, rather coarse and very close, becoming somewhat more obscure and indefinite on vertex; cheeks rather dull, closely but exceedingly minutely punctate above, becoming obscurely substriate below and posteriorly, but ventral surface smooth and shining; hypostomal carinae parallel, apical angle broadly rounded; lower half of face somewhat shining, punctures deep, distinct, well separated but not sparse, those on supraclypeal area somewhat finer, rather close laterally, becoming somewhat more sparse medially, those on clypeus fine, well separated along upper margin, becoming somewhat more coarse, deep and sparse apically, apical half blackened; scutum and scutellum rather dull (fig. 99), punctures rather distinct but variable in size, well separated on scutum medially, becoming very close but not crowded between notaulices and tegulae, scutellum with an impressed median line, somewhat more finely and closely punctate medially than on each side; pleura dull, rather finely rugose anteriorly becoming somewhat smoother but densely tessellate posteriorly; dorsal area of propodeum rather irregularly and completely striate medially, becoming more coarsely and regularly striate laterally, lateral faces rather dull, finely roughened or subrugose; wings subhyaline, veins and stigma yellowish-testaceous; tegulae more brownish-testaceous, becoming hyaline anteriorly; legs piceous basally, becoming brownish-testaceous apically; abdominal terga shining, basal tergum with scattered, exceedingly minute and rather close punctures across center of disc, terga 2 and 3 rather closely and uniformly but very minutely punctate, punctures becoming somewhat more vague and indefinite apically, apical impressed area rather indefinite medially, becoming more distinct laterally, largely concolorous with basal portions of discs, but becoming very narrowly yellowish-hyaline along rims, terga 3 and 4 partially obscured by thin, pale tomentum.
DISTRIBUTION—Minnesota to Maine, south to Georgia; April to September.
FLOWER RECORDS—Apocynum, Barbarea, Brassica, Chrysanthemum, Fagopyrum, Malus, Melilotus, Plantago, Potentilla, Rhus, Rubus, Rudbeckia, Senecio, Solidago, Taraxacum, Viburnum and Vitis.
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