Identification Atlas of the Vespidae (Hymenoptera, Aculeata) of the northeastern Nearctic region
Matthias Buck, Stephen A. Marshall, and David K.B. Cheung
Department of Environmental Biology, University of Guelph, Guelph, Ontario, Canada N1G 2W1
Variation. Fore wing length 8.0–9.0 mm (♂♂), 9.0–11.0 mm (♀♀). Female clypeus with a pair of yellow dorsal spots, completely black in about one third of specimens; male clypeus yellow, with narrow black or brownish apical margin, sometimes with a small black apical spot, or with a pair of irregular discal spots. Female scape below more or less ferruginous, brownish, or dirty yellow, sometimes partially bright yellow. Mesopleuron usually completely black, in some females with a small yellow dorsal spot. Tegula translucent reddish except black basal section, rarely with small and often obscure yellow spots anteriorly and/or posteriorly. Hind margin of parategula often narrowly obscure reddish. Terga 1 and 2 with apical fasciae, in male sometimes also with narrow, subinterrupted fasciae on terga 3 and 4, in female rarely with a pair of spots in posterolateral corners. Apical fascia of tergum 1 usually expanded forward near lateral margin. Sternum 2 with a pair of yellow spots in posterolateral corners, posterolateral spots on sternum 3 often present in male, rarely in female, the following sterna up to sternum 6 rarely spotted as well in male.
Distribution. Apparently widely distributed in the eastern Nearctic but rare. Canada: southwestern Ontario (Kent, Essex, and Lambton Cos.). Eastern and midwestern U.S.: MI (1 ♀, Wayne Co., Dearborn; photographic record, Bugguide), IL (1 ♀, Lake Co., Reed Turner Woodland; Fig. 35.6, see also Bugguide), MD (1 ♀, Baltimore Co., USNM), DC (1 ♀, USNM), VA (2 ♂♂, Black Pond and Alexandria, USNM), NE (1 ♀, Sarpy Co., Bellevue; Fig. 35.7, see also Bugguide) and AR (1 ♀, Fulton Co., Mammoth Spring; FSCA).
Biology. Unknown. Probably nests in borings in wood like other members of the E. foraminatus-group. Most of the females collected by the senior author were scraping dry clay from the disturbed ground of a rarely frequented woodland trail.