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 Kondratieff, B.C. & Kirchner, R.F. (1988) A new species of Acroneuria from Kentucky (Plecoptera: Perlidae) and new records of stoneflies from eastern North America. Journal. Kansas Entomological Society 61, 201–207.