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Artistic view of a Male Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Adult from the Gallatin River in Montana
Salmonflies
Pteronarcys californica

The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.

Dorsal view of a Grammotaulius betteni (Limnephilidae) (Northern Caddisfly) Caddisfly Larva from the Yakima River in Washington
This is a striking caddis larva with an interesting color pattern on the head. Here are some characteristics I was able to see under the microscope, but could not easily expose for a picture:
- The prosternal horn is present.
- The mandible is clearly toothed, not formed into a uniform scraper blade.
- The seems to be only 2 major setae on the ventral edge of the hind femur.
- Chloride epithelia seem to be absent from the dorsal side of any abdominal segments.
Based on these characteristics and the ones more easily visible from the pictures, this seems to be Grammotaulius. The key's description of the case is spot-on: "Case cylindrical, made of longitudinally arranged sedge or similar leaves," as is the description of the markings on the head, "Dorsum of head light brownish yellow with numerous discrete, small, dark spots." The spot pattern on the head is a very good match to figure 19.312 of Merritt R.W., Cummins, K.W., and Berg, M.B. (2019). The species ID is based on Grammotaulius betteni being the only species of this genus known in Washington state.
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.

Cheumatopsyche (Little Sister Sedge) Caddisfly Pupa Pictures

This is the first fully formed caddis pupa (technically, a pharate adult) that I've collected and photographed alive and healthy. I'll put a video of this specimen online soon, too.

Lateral view of a Cheumatopsyche (Hydropsychidae) (Little Sister Sedge) Caddisfly Pupa from Cayuta Creek in New York
Green caddisfly pupa. Technically a "pharate adult," this is the final aquatic stage of the caddisfly before it emerges as a winged adult

Cheumatopsyche (Hydropsychidae) (Little Sister Sedge) Caddisfly Pupa from Cayuta Creek in New York
Cheumatopsyche (Hydropsychidae) (Little Sister Sedge) Caddisfly Pupa from Cayuta Creek in New York
Cheumatopsyche (Hydropsychidae) (Little Sister Sedge) Caddisfly Pupa from Cayuta Creek in New York
Cheumatopsyche (Hydropsychidae) (Little Sister Sedge) Caddisfly Pupa from Cayuta Creek in New York
Cheumatopsyche (Hydropsychidae) (Little Sister Sedge) Caddisfly Pupa from Cayuta Creek in New York
Dorsal view of a Cheumatopsyche (Hydropsychidae) (Little Sister Sedge) Caddisfly Pupa from Cayuta Creek in New York
Cheumatopsyche (Hydropsychidae) (Little Sister Sedge) Caddisfly Pupa from Cayuta Creek in New York
Ruler view of a Cheumatopsyche (Hydropsychidae) (Little Sister Sedge) Caddisfly Pupa from Cayuta Creek in New York The smallest ruler marks are 1 mm.
Cheumatopsyche (Hydropsychidae) (Little Sister Sedge) Caddisfly Pupa from Cayuta Creek in New York

This caddisfly was collected from Cayuta Creek in New York on April 14th, 2007 and added to Troutnut.com by Troutnut on April 22nd, 2007.

Discussions of this Pupa

imitation?
4 replies
Posted by Flytyer0423 on Aug 14, 2009
Last reply on Oct 5, 2012 by Sayfu
what is a good caddis pupa pattern ive been looking for them online and didnt find anything that worked for me

thanks-
natureboy
Hydropsychidae (?)
6 replies
Posted by GONZO on Apr 23, 2007
Last reply on Dec 22, 2007 by Creno
This looks like a hydropsychid to me, but I'd be happy to have comments from the experts.

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References

Cheumatopsyche (Little Sister Sedge) Caddisfly Pupa Pictures

Collection details
Location: Cayuta Creek, New York
Date: April 14th, 2007
Added to site: April 22nd, 2007
Author: Troutnut
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