The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.
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.