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Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin
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.

Dorsal view of a Glossosoma (Glossosomatidae) (Little Brown Short-horned Sedge) Caddisfly Larva from the Yakima River in Washington
I caught this tiny larva without a case, but it seems to key pretty clearly to to Glossosomatidae. From there, the lack of sclerites on the mesonotum points to either Glossosoma or Anagapetus. Although it's difficult to see in a 2D image from the microscope, it's pretty clear in the live 3D view that the pronotum is only excised about 1/3 of its length to accommodate the forecoxa, not 2/3, which points to Glossosoma at Couplet 5 of the Key to Genera of Glossosomatidae Larvae.
27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.
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Neoleptophlebia Mayfly Nymph Pictures

This mayfly was collected from the Vermillion River in Montana on June 16th, 2005 and added to Troutnut.com by Bnewell on June 27th, 2011.

Discussions of this Nymph

Neoleptophlebia
1 replies
Posted by Millcreek on Jul 19, 2019
Last reply on Jul 19, 2019 by Troutnut
This should be under Neoleptophlebia. Paper is here.http://biosoil.ru/files/00013828.pdf

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Neoleptophlebia Mayfly Nymph Pictures

Collection details
Location: Vermillion River, Montana
Date: June 16th, 2005
Added to site: June 27th, 2011
Author: Bnewell
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