Hex Mayflies
Hexagenia limbata
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.
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These big caddisflies were tempting trout as they wriggled out of their shucks, while others skated across the water at a medium pace, probably egg-laying.
Litobrancha on May 19, 2007May 19th, 2007, 6:41 pm EDT
jason can you take some better pictures of the genital terminalia? especially the tenth tergite and spines above the inferior appendages? nice specimen.