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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.

Lateral view of a Psychodidae True Fly Larva from Mystery Creek #308 in Washington
This wild-looking little thing completely puzzled me. At first I was thinking beetle or month larva, until I got a look at the pictures on the computer screen. I made a couple of incorrect guesses before entomologist Greg Courtney pointed me in the right direction with Psychodidae. He suggested a possible genus of Thornburghiella, but could not rule out some other members of the tribe Pericomini.
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.
Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or support the project for an enhanced experience here.

Lepidostoma (Little Brown Sedge) Caddisfly Larva Pictures

Ruler view of a Lepidostoma (Lepidostomatidae) (Little Brown Sedge) Caddisfly Larva from Mystery Creek #199 in Washington The smallest ruler marks are 1 mm.
Case view of a Lepidostoma (Lepidostomatidae) (Little Brown Sedge) Caddisfly Larva from Mystery Creek #199 in Washington
Lepidostoma (Lepidostomatidae) (Little Brown Sedge) Caddisfly Larva from Mystery Creek #199 in Washington
Lepidostoma (Lepidostomatidae) (Little Brown Sedge) Caddisfly Larva from Mystery Creek #199 in Washington
Lepidostoma (Lepidostomatidae) (Little Brown Sedge) Caddisfly Larva from Mystery Creek #199 in Washington
Lepidostoma (Lepidostomatidae) (Little Brown Sedge) Caddisfly Larva from Mystery Creek #199 in Washington
Lepidostoma (Lepidostomatidae) (Little Brown Sedge) Caddisfly Larva from Mystery Creek #199 in Washington
Lateral view of a Lepidostoma (Lepidostomatidae) (Little Brown Sedge) Caddisfly Larva from Mystery Creek #199 in Washington
Lepidostoma (Lepidostomatidae) (Little Brown Sedge) Caddisfly Larva from Mystery Creek #199 in Washington
Dorsal view of a Lepidostoma (Lepidostomatidae) (Little Brown Sedge) Caddisfly Larva from Mystery Creek #199 in Washington
Ventral view of a Lepidostoma (Lepidostomatidae) (Little Brown Sedge) Caddisfly Larva from Mystery Creek #199 in Washington
Lepidostoma (Lepidostomatidae) (Little Brown Sedge) Caddisfly Larva from Mystery Creek #199 in Washington

This caddisfly was collected from Mystery Creek #199 in Washington on July 28th, 2019 and added to Troutnut.com by Troutnut on July 30th, 2019.

Discussions of this Larva

Don't think it is Gumaga........
1 replies
Posted by Creno on Aug 5, 2019
Last reply on Aug 6, 2019 by Troutnut
Just getting back to the PC and a good look at your above pics. I don't think this is Gumaga. From what I can see it lacks the divided mesonotum and the metanotal sclerites are the wrong shape/size for Gumaga. The fact that you couldn't see the antennae makes me think they are right next to the eye. The rest of the characters also suggest this is one of the Lepidostoma and the case suggests pluviale group, which are very common in that part of the world.
Interesting caddisfly for Roger/Taxon
Posted by Troutnut on Jul 30, 2019
Last reply on Jul 30, 2019 by Troutnut
I ran across [this thread on Roger's site](http://www.flyfishingentomology.com/forum/Replies_Display.php?t=0134) discussing with Kurt the identity of a larva fairly similar to this one. I keyed this one out to Sericostomatidae with the dissecting microscope (although I couldn't really make out the antennae at all), and from there it easily keys to Gumaga. I was uncertain in enough places that I was pleased to get to the end of the key and find cases that perfectly match this specimen.

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Lepidostoma (Little Brown Sedge) Caddisfly Larva Pictures

Collection details
Location: Mystery Creek #199, Washington
Date: July 28th, 2019
Added to site: July 30th, 2019
Author: Troutnut
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