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 |
---|---|
Costal angle of hind wings acute or at a right angle (source fig 13.165b) | Costal angle of hind wings usually rounded (source figs 13.166-13.168) |
Vein A1 of forewings unforked | If costal angle of hind wings nearly acute or at right angles, then vein A1 of forewings forked near margin (source fig 13.167) |
Costal crossveins of forewings basal of bullae weak or atrophied (source fig 13.165a) | Costal crossveins of forewing basal of bullae well-developed (source fig 13.167) |
Remaining families: Ephemeridae, Euthyplociidae, Palingeniidae, Polymitarcyidae, and Potamanthidae | |
5 Example Specimens | |
Neoephemeridae Genus Neoephemera | Go to Couplet 5 |