Ostrocerca prolongata

Ostrocerca prolongata (Claassen, 1923) Notes This is an infrequently reported species commonly known as the Bent Forestfly (Stark et al. 2012). Its current known range extends from Quebec and New Brunswick south along the Appalachian Mountains to Virginia and West Virginia (DeWalt et al. 2024, Grubbs and Baumann 2023, Young et al. 1989). Harper (1990 a) studied the life cycle of this species in a small, intermittent Laurentian stream and reported emergence of adults from May to June and suggested a diapause of the eggs during the summer. In New York, adults were collected from early May through early July (Fig. 18). This species was collected from smaller streams and spring-fed seeps at elevations ranging from 337-633 m asl (Fig. 19) from scattered localities in the Level IV Ecoregions Acid Sensitive Adirondacks (58 aa), Northern and Western Adirondack Foothills (58 ab), Eastern Adirondack Foothills (58 ac), Central Adirondacks (58 ad), and Adirondack High Peaks (58 z) (Fig. 20 b).