Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.
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.
Fishnflies on Oct 12, 2014October 12th, 2014, 6:45 am EDT
Check out some new flies at www.fishnflies.com, brand new uploaded today this morning. Trout flies and warm water flies. A popular midge pattern for the midwest will definitely help with your planned trip to the White River as well as warm water patterns that will help you catch bass and even pike on the website today.