Ostrocerca albidipennis

Ostrocerca albidipennis (Walker, 1852) Notes This species is commonly referred to as the Whitetailed Forestfly (Stark et al. 2012). The distribution of O. albidipennis extends from Nova Scotia west to Michigan and southwest along the Appalachian Mountains to Ohio, West Virginia, and Virginia (DeWalt et al. 2024, Grubbs and Baumann 2023). Mackay (1969) reported a fast univoltine life cycle from southern Quebec and the possibility of a summer-autumn egg diapause, with adult emergence during May and June and larval recruitment beginning in early December. This species has been previously reported from smaller streams and spring-fed seeps many of which are dry during the summer months (Harper and Hynes 1971 b). New York records are mainly from Level III Ecoregions Northeast Highlands (58), Northern Allegheny Plateau (60), and Eastern Great Lakes Lowlands (83) (Fig. 17 f) with adult collection dates ranging from early May to late June (Fig. 18). Elevations in New York range from 119-729 m asl (Fig. 19).