Genus Aldrichia

Aldrichia Coquillett 1894

named in honor of J.M. Aldrich, a prominent dipterist who provided the holotype of A. ehrmanii to D.W. Coquillett [info supplied by Joel Kits]

2 spp., both in our area(1)

body length 8-10 mm

all black; thorax and abdomen covered with sparse long hairs, mostly black but may also be light gray; wings "smoky" dark gray to blackish near costa, becoming clearer toward inner margin and especially near base; second antennal segment as long as the first or longer, and both cylindrical, stout, much thickened, and bristly; third segment flat but much widened in the middle, the apex with some long stiff hairs; marginal cell of wing not usually widened apically; three submarginal cells

e. US (NY-NC to KS-TN)(1)

flies in May-Jun

A. ehrmanii adults have been reported on flowers of Shepherd's Purse (Capsella bursa-pastoris), Long-styled Sweet-cicely (Osmorhiza longistylis), Philadelphia Fleabane (Erigeron philadelphicus), and Golden Alexanders (Zizia aurea), etc.