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 |
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Occiput with a transverse row of regularly spaced spinules or distinctly elevated ridge | Occiput either without spinules, except possibly laterally near the eyes or else with a sinuate, irregularly spaced spinule row |
Remaining genera: Agnetina, Claassenia, Neoperla, and Paragnetina | Remaining genera: Acroneuria, Anacroneuria, Attaneuria, Beloneuria, Calineuria, Doroneuria, Eccoptura, Hansonoperla, Hesperoperla, Perlesta, and Perlinella |
5 Example Specimens | 5 Example Specimens |
Go to Couplet 2 | Go to Couplet 5 |