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.
|Option 1||Option 2|
|Mesoscutellum without long hairs ||Mesoscutellum with tuft of long, fine hairs|
|Forewings each less than 20 mm long||Forewings each more than 20 mm long|
|Adults as in sf 10.191|
1 Example Specimen
Species Himalopsyche phryganea