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.
This species resembles Drunella grandis but the spines tell the story.
This mayfly was collected from 6 mile Creek in Montana on December 19th, 2009 and added to Troutnut.com by Bnewell on June 26th, 2011.