Rasvena terna

Rasvena terna (Frison, 1942) Notes This rare species is commonly referred to as the Vermont Sallfly (Stark et al. 2012), distributed mainly along the Appalachian Mountains from southern Quebec south to north Georgia (Surdick 2004, Grubbs and Singai 2018, DeWalt et al. 2024). Grubbs and Singai (2018) provided scanning electron micrographs of diagnostic adult and larval characteristics together with a discussion of the distribution of this species. No larval biology is known. Adults have been collected in New York from mid-May to late June (Fig. 26) at elevations ranging from 175-529 m asl (Fig. 27) with few records available from Level IV Ecoregions Taconic Mountains (58 a), Taconic Foothills (58 x), Adirondack High Peaks (58 z), Eastern Adirondack Foothills (58 ac), Central Adirondacks (58 ad), and Champlain Lowlands (83 b) (Fig. 29 d).