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 Baumann, R.W. & Jacobi, G.Z. (1984) Two new species of stoneflies (Plecoptera) from New Mexico. Proceedings of the Entomological Society of Washington 86, 147–154.