Isogenoides varians (Walsh) .

This is a warmwater, riverine species known from Minnesota, south to Kansas and Mississippi and east to the Carolinas and Virginia (Sandberg & Stewart 2005). In Illinois, Frison (1935) presented two records, one male for Rock Island on the Mississippi River and another male from Golconda on the Ohio River. Sandberg & Stewart (2005) presented several additional records for the Wabash River at Mt. Carmel. In Indiana, there are a number of historical records from the East Fork and main stem White Rivers in southern Indiana (Frison 1937). Sandberg & Stewart (2005) presented additional PERC records for the species from the Wabash River at Tippecanoe. The only recent record in the entire Midwest appeared to be from Iowa’s Cedar River (Heimdal et al. 2004). We thought it was extirpated from the Midwest (Grubbs 2004; DeWalt et al. 2005) until finding several exuviae along the Wabash River in Indiana.

IN, Fountain Co.; Wabash River, Attica at Potawatomie Park, 40.2942, -87.2942, 4/22-24/2010, R.E. DeWalt, M. Pessino, 11 exuviae (INHS) .