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.
|Cerci approximately two thirds length of median filament
|Cerci less than one-half length of median filament
|Abdominal sterna with solid color, never with longitudinal stripes or other such markings
|Abdominal sterna almost always with three dark, longitudinal markings
|Remaining species: Caudatella columbiella and Caudatella heterocaudata
|Go to Couplet 4