Hydroperla crosbyi (Needham & Claassen) .

This species has been reported from Texas and Arkansas, and north through southern Indiana (Frison 1935; Ricker 1945; Bednarik & McCafferty 1977; Poulton & Stewart 1991; DeWalt et al. 2005).

We present several records that expand the known range in both states. IL, Adams Co., Bear Creek, 2.75 km W Marcelline, 40.1205, -91.3978, 5/5/2005. R.E. DeWalt, ♂ (INHS); Alexander Co., Ohio River, Fort Defiance State Park, 36.98787, -89.14087, 4/26/2005, D.W. Webb, ♀ (INHS) ; Jasper Co., Embarras River, 4.3 km W Hidalgo, 39.1559, -88.2071, 4/8/1999, R.E. DeWalt, ♂, N, 3 exuviae (INHS) ; North Fork Embarras River, 4.5 km SE Willow Hill, 38.9774, -87.9598, 4/7/1999, R.E. DeWalt, 2 exuviae (INHS) ; Mason Co., Quiver Creek, 8 km NE Havanna, 40.3345, -89.979, 4/14/1999, R.E. DeWalt, 2 exuviae (INHS) ; Salt Creek, 7 km SW New Holland, 40.1394, -89.6211, 4/28/2005, R.E. DeWalt, 7 exuviae (INHS) ; Piatt Co., Sangamon River, 3 km N Monticello, 40.0502, -88.5791, 4/29/2005, R.E. DeWalt, 2 exuviae (INHS) ; Rock Island Co., Rock River, Rock Island, [41.459, -90.579], 4/18/1931, T.H. Frison, ♀ (reared) (INHS) ; Vermilion Co., Middle Fork Vermilion River at Johnson Hill Bridge, 3 km SW Newtown, 40.1603, - 87.704, 4/16/2005, R.E. DeWalt, 5 exuviae (INHS) ; Wabash Co., Wabash River at Grand Rapids, 3 km NE Mt. Carmel, 38.4361, -87.7441, 4/13/2005, R.E. DeWalt, K. Moss, 5 exuviae (INHS) ; IN, Fountain Co., Wabash River, Attica at Potawatomie Park, 40.2942, -87.2546, 4/22/2010, R.E. DeWalt, M. Pessino, exuvium (INHS) ; Greene Co., West Fork White River, Worthington at boat ramp, 39.1117, -86.9621, 3/25/2006, R.E. DeWalt, S.A. Grubbs, 2♂ (INHS) ; Marion Co., Tremont, [39.76449, -86.31044], 5/9/1939, H. Dybas, ♀ (FMNH) ; Montgomery Co., Sugar Creek, Crawfordsville, 200 m upstream US-136, 40.05029, -86.92166, 3/6/2007, R.E. DeWalt, N (INHS) .