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 Nelson, C.H. & Kondratieff. 1980. Description of a new species of Alloperla (Plecoptera: Chloroperlidae) from Virginia. Journal of the Kansas Entomological Society (J. Kans. Entomol. Soc.) 53(4):801-804