The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
This species is uncommonly collected except from wells. It is a hyporheic species living in the river gravels of river floodplains until it is ready to emerge.
The head shape is an important identifier.
This stonefly was collected from the Flathead River-upper in Montana on April 15th, 2010 and added to Troutnut.com by Bnewell on June 26th, 2011.