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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Foretibiae not adapted for burrowing (source fig 13.8) | Foretibiae modified for burrowing, either broad or with tubercles (source fig 13.7) |
Abdominal gills lateral | Abdominal gills dorsal |
Remaining families: Ephemeridae, Palingeniidae, and Polymitarcyidae | Remaining families: Euthyplociidae and Potamanthidae |
5 Example Specimens | |
Go to Couplet 6 | Go to Couplet 5 |