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

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

Artistic view of a Perlodidae (Springflies and Yellow Stones) Stonefly Nymph from the Yakima River in Washington
This one seems to lead to Couplet 35 of the Key to Genera of Perlodidae Nymphs and the genus Isoperla, but I'm skeptical that's correct based on the general look. I need to get it under the microscope to review several choices in the key, and it'll probably end up a different Perlodidae.
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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Female Hesperophylax designatus (Limnephilidae) (Silver Striped Sedge) Caddisfly Adult from the Touchet River in Washington
JpMcKenzie's profile picture
Canada Québec

Posts: 2
JpMcKenzie on Dec 16, 2017December 16th, 2017, 4:12 am EST
Hey! How would you tell this is a female? thank you!
Jean-Philip, Mckenzie river Fly Fishing Lodge guide, Labrador.
Adventure & Entomology passionate!
Grants Pass, OR

Posts: 302
Creno on Dec 16, 2017December 16th, 2017, 11:35 am EST
probably cannot be sure from this pic only. If you could clearly see the palps, a male limnephilid has 3 palpal segments while the female has 5. I cannot see the palpal segments clearly in this specimen. Since Bob Newell took this pic it is likely he kept the specimen and could look at it with a microscope or other magnification. The females of Hesperophylax are easily separated to species based on their genitalia. Alot easier than the males.

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