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.

Stream photos

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Holocentropus Caddisfly Larva Holocentropus Caddisfly Larva

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.

11 Recently Added Photos

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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Agnetina capitata (Golden Stone) Stonefly Nymph Pictures

Dorsal view of a Agnetina capitata (Perlidae) (Golden Stone) Stonefly Nymph from Salmon Creek in New York

Ventral view of a Agnetina capitata (Perlidae) (Golden Stone) Stonefly Nymph from Salmon Creek in New York

Agnetina capitata (Perlidae) (Golden Stone) Stonefly Nymph from Salmon Creek in New York

This stonefly was collected from Salmon Creek in New York on March 29th, 2006 and added to Troutnut.com by Troutnut on April 7th, 2006.

Discussions of this Nymph

Probably Agnetina capitata

5 replies

Posted by GONZO on Oct 4, 2006

Last reply on Mar 23, 2011 by Jmd123

The row of spinules across the back of the head in combination with the presence of anal gills indicates that Agnetina is the likely genus; and the dorsal pattern appears to be classic capitata.

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