Bittacus pilicornis Westwood, 1846
Diagnosis: Males of this species have short epiandrial lobes (as long as the basistyles), and an equally long cercus. The epiandrial lobes have small, dark denticles on the apical half. The proctiger rises high above the epiandrial lobes and is apically bifurcate. However, the most distinctive feature of this species is the long pilosity of the antennae in both sexes, unique among North American species. In the field this species is often found associated with early emergent Bittacus strigosus, but this species is larger and more brown and less gray in color than Bittacus strigosus..
Distribution – Geographical: This species is found throughout eastern North America from Massachusetts to Florida westward to Iowa and eastern Texas.
Distribution – Temporal: This species emerges as adults from late May to late July, with a peak emergence in June.
Ecology: Adults can be found in moist, hardwood forests near streams. They prefer shaded areas of high humidity.
Biology: Setty (1940) described the immature stages and habitat requirements.
Notes: The name pilicornis refers to the distinctive long hairs on the antennae.
Setty, L.R. 1940. Biology and morphology of some North American Bittacidae (Order Mecoptera). American Midland Naturalist, 23:257-353.
Westwood, J.O. 1846. A Monograph of the Genus Panorpa, with Descriptions of some Species belonging to other allied Genera. Transactions of the Royal Entomological Society of London, 4:184-196.