The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
I keyed this specimen to Paragnetina, and range maps would seem to rule out every species of that genus except for the common Paragnetina media.
This stonefly was collected from the Namekagon River in Wisconsin on June 15th, 2021 and added to Troutnut.com by Troutnut on June 20th, 2021.