Bolotoperla rossi (Frison)

, the rarest Pennsylvania species in the family, was previously known from only few adults collected from 3 medium sized creeks in the Susquehanna River basin (Masteller 1996). This species has apparently not been documented in the nymph stage in Pennsylvania. Emergence begins in early April and continues through mid-May, later than most other members of the family. Bolotoperla rossi ranges from Maine south to North Carolina.

New records: DAUPHIN: (S) Manada Creek, Furnace Road, 1 April 2000, 1♂ (CL); PIKE: (D) Dingmans Creek between falls and parking lot, 21 May 2000, 1♀ (CL).