This specimen resembled several others of around the same size and perhaps the same species, which were pretty common in my February sample from the upper Yakima. Unfortunately, I misplaced the specimen before I could get it under a microscope for a definitive ID.
Fishnflies on Oct 8, 2014October 8th, 2014, 4:17 pm EDT
I'm certainly a trout nut when I catch gorgeous browns like this in Northern Arkansas.
Link to Picture: http://www.fishnflies.com/#!Early-October-White-River-Brown/zoom/cc0e/image6kh