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.
A photo showing the minor details on the nymph of this rarely collected mayfly
This mayfly was collected from the Big Thompson River in Montana on November 30th, 1999 and added to Troutnut.com by Bnewell on June 26th, 2011.