Hansonoperla appalachia Nelson

is known from only a few small to medium forested cold water creeks in Pennsylvania and in the Appalachians from New Hampshire south to Virginia. Nymphs are rarely collected, and when present, usually only one or two individuals are found at any one site. Only one adult record from Pennsylvania exists (Masteller 1996). The most nymphs collected in Pennsylvania were from Babb Creek, Tioga County, which has been affected by abandoned coal mine discharges and has a pH of 5.0 and slightly elevated dissolved aluminum (Pennsylvania Department of Environmental Protection, unpublished data).

New records: SUSQUEHANNA: (S) Nick Creek, Auburn Township, 23 June 2000, one nymph (TS); unnamed tributary to Choconut Creek, near outlet of Lake Sophia, 21 June 2000, one nymph (SRBC).