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. & Kondratieff, B.C. (1987) A new species of Peltoperla from eastern North America (Plecoptera: Peltoperlidae). Proceedings of the Entomological Society of Washington 89, 141–146.