Hydroperla fugitans (Needham & Claassen)

Distribution. USA: AR, IA, IL, IN, KS, MO, TN, TX (DeWalt et al. 2015)

Material examined. McCreary Co., Cumberland River, Cumberland Falls State Resort Park, 36.8393, -84.3446, 12 May 1939, T. H. Frison & H.H. Ross, 9 exuviae (INHS); same locality but 12 June 1940, T. H. Frison & H.H. Ross, 4 exuviae (INHS); same locality but 11 May 1988, R.W. Baumann, R.F. Kirchner, B.C. Kondratieff, & C. R. Nelson, 4 exuviae (BYUC).

Comments. Nymphs and nymphal exuviae of this species have distinctive pigmentation patterns (Ray & Stark 1981, Nelson 1996). The recollection of exuviae in 1988 is evidence that this species still persists in the Cumberland River Basin. We anticipate that H. fugitans is in other large rivers such as the lower Green and Ohio rivers.