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.
I found this nymph wriggling in the surface film during a hatch of related Strophopteryx adults. This nymph died in transport so it's not alive in the photos, but it's pretty close to its live colors.
This stonefly was collected from unknown in Wisconsin on March 18th, 2004 and added to Troutnut.com by Troutnut on January 25th, 2006.