This is the first of it's family I've seen, collected from a tiny, fishless stream in the Cascades. The three species of this genus all live in the Northwest and are predators that primarily eat stonefly nymphs Merritt R.W., Cummins, K.W., and Berg, M.B. (2019).
Described by Stark, B.P. & Baumann, R.W. (1978) New species of Nearctic Neoperla (Plecoptera: Perlidae), with notes on the genus. The Great Basin Naturalist 38, 97–114.