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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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Dorsal view of a Agnetina capitata (Perlidae) (Golden Stone) Stonefly Nymph from Fall Creek in New York
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"Bear Swamp," PA

Posts: 1681
GONZO on Apr 3, 2007April 3rd, 2007, 4:53 am EDT
From the anal gills and the markings, this appears to be Agnetina--probably capitata.
Cooperstown, NY

Posts: 2
Boyle on May 7, 2007May 7th, 2007, 2:25 pm EDT
In case you didn't know, there is an excellent color drawing of Perla capitata, as the species was formerly known, which you can compare to your excellent color photographs. It serves as the frontispiece to Peter W. Claassen's Plecoptera Nymnphs of America North of Mexico (Springfield, Ill: The Thomas Say Foundation, 1931).On page 45 Claassen notes: "...easily recognized by the two dark transverse bands across the head, the two dark trabnsverse bands on the femeora, the presence of caudal gills and the yellow and dark banded abdomen." As with you, Claasssen was at Cornell.


RH Boyle, Cooperstown, NY
Troutnut's profile picture
Bellevue, WA

Posts: 2758
Troutnut on May 8, 2007May 8th, 2007, 4:14 am EDT
Thanks Boyle, good info!
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist

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