I'm calling this one very tentatively Helicopsyche borealis
, with some big caveats that I might be wrong.
It seems to key fairly easily to Helicopsychidae
, except at the last couplet in Merritt & Cummins (5th ed) it's supposed to have “anal processes short and straight, each with several mesal setae
and 2 long apical setae
,” whereas this one has VERY short, straight processes with 3 long apical setae
and no mesal
Additionally, the only species of Helicopsychidae
documented in this region is Helicopsyche borealis
, which is supposed to emerge much later in the summer.