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; pubescence white, very short and thin, somewhat more dense on thorax laterally; head somewhat broader than long; clypeus slightly convex, projecting about one-half below suborbital line; eyes slightly convergent below; cheeks subequal to eyes in width; lateral ocelli slightly nearer margin of vertex than to eyes; face above antennae shining, punctures fine but deep and distinct, slightly separated, supraclypeal area and lateral portions of face below shining, somewhat more sparsely punctate; clypeus shining and rather sparsely punctate, punctures becoming coarser apically; area between eyes and ocelli shining, punctures scattered and very minute, median portion of vertex shining and obscurely punctate; upper portion of cheeks shining, minutely and obscurely punctate, becoming rather distinctly striate below; scutum shining, punctures rather deep and distinct, well separated in median portion of disc, becoming quite close laterally, scutellum shining, punctures variable in size, scattered on each side of a somewhat more closely and finely punctate median line; pleura rather coarsely rugose; dorsal area of propodeum coarsely rugoso-striate, posterior face relatively smooth, margined laterally with distinct carinae which extend fully to the dorsal margin; wings subhyaline, veins and stigma ferruginous; tegulae fuscous to blackish, with a paler, median spot and yellowish-hyaline, anterior margin; legs blackish except for the extreme apical segments; hind basitibial plate somewhat obscured by pubescence, triangularly acute; abdominal terga polished, very minutely punctate, punctures scattered and irregular on basal tergum, quite close on basal portions of the following terga but very sparse apically on 2 and 3, terga 2-4 with dense, white, basal fasciae, discal pubescence very sparse, short and inconspicuous, entirely pale.
Male - John Ascher has pointed out that the Mitchell's description of the male of L. truncatum (listed as Evylaeus truncatus) is that actually of L. oenotherae.
DISTRIBUTION—Maine and Quebec to Washington (state), south to Georgia; March to October.
FLOWER RECORDS—Apocynum, Aronia, Barbarea, Brassica, Ceanothus, Chrysanthemum, Crataegus, Erigeron, Eupatorium, Krigia, Melilotus, Rubus, Salix, Solidago and Viburnum. Robertson (1929) records this species also on Claytonia, Cryptotaenia, Hydrangea, Malva and Sium.