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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 Holocentropus (Polycentropodidae) Caddisfly Larva from the Yakima River in Washington
This one seems to tentatively key to Holocentropus, although I can't make out the anal spines in Couplet 7 of the Key to Genera of Polycentropodidae Larvae nor the dark bands in Couplet 4 of the Key to Genera of Polycentropodidae Larvae, making me wonder if I went wrong somewhere in keying it out. I don't see where that could have happened, though. It might also be that it's a very immature larva and doesn't possess all the identifying characteristics in the key yet. If Holocentropus is correct, then Holocentropus flavus and Holocentropus interruptus are the two likely possibilities based on range, but I was not able to find a description of their 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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Neophylax (Autumn Mottled Sedge) Caddisfly Larva Pictures

The size of the head compared to the body in this larva is surprising, and I think this means it's a fairly early instar of something which is going to get a lot bigger, but I'm not sure.

Ruler view of a Neophylax (Thremmatidae) (Autumn Mottled Sedge) Caddisfly Larva from the Neversink River (above reservoir) in New York The smallest ruler marks are 1 mm.
Case view of a Neophylax (Thremmatidae) (Autumn Mottled Sedge) Caddisfly Larva from the Neversink River (above reservoir) in New York
Neophylax (Thremmatidae) (Autumn Mottled Sedge) Caddisfly Larva from the Neversink River (above reservoir) in New York
Lateral view of a Neophylax (Thremmatidae) (Autumn Mottled Sedge) Caddisfly Larva from the Neversink River (above reservoir) in New York
Dorsal view of a Neophylax (Thremmatidae) (Autumn Mottled Sedge) Caddisfly Larva from the Neversink River (above reservoir) in New York
Neophylax (Thremmatidae) (Autumn Mottled Sedge) Caddisfly Larva from the Neversink River (above reservoir) in New York
Neophylax (Thremmatidae) (Autumn Mottled Sedge) Caddisfly Larva from the Neversink River (above reservoir) in New York
Neophylax (Thremmatidae) (Autumn Mottled Sedge) Caddisfly Larva from the Neversink River (above reservoir) in New York

This caddisfly was collected from the Neversink River (above reservoir) in New York on May 6th, 2007 and added to Troutnut.com by Troutnut on May 10th, 2007.

Discussions of this Larva

Looks like neophylax
1 replies
Posted by Litobrancha on May 13, 2007
Last reply on Dec 21, 2007 by Creno
can't tell how much mesonotum sclerites are emarginated but has the horsehead look of Neophylax. case too. legs are long too. don't know any of the other uenoids.

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Neophylax (Autumn Mottled Sedge) Caddisfly Larva Pictures

Collection details
Location: Neversink River (above reservoir), New York
Date: May 6th, 2007
Added to site: May 10th, 2007
Author: Troutnut
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