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 one seems to lead to Couplet 35 of the Key to Genera of Perlodidae Nymphs and the genus Isoperla, but I'm skeptical that's correct based on the general look. I need to get it under the microscope to review several choices in the key, and it'll probably end up a different Perlodidae.
Grew up fishing in Tennessee in and around The Great Smoky Mountains. I have been fly fishing pretty much exclusively for around ten years now. Within the last few months, I have really developed a keen interest in Aquatic Entomology and look forward to developing a deeper knowledge of the subject.