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Pteronarcys californica

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

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Male Agnetina capitata (Golden Stone) Stonefly Adult Pictures

This stonefly emerged in my aquarium, and unfortunately I severely damaged its wings just trying to catch it. It's still an interesting specimen, especially since I was able to also photograph the nymphal shuck it emerged from. I was surprised by just how light it was shortly after emerging. I photographed it a couple days later when it had darkened considerably; it was a pale, almost pastel yellow at first.

This stonefly was collected from Aquarium in New York on May 1st, 2007 and added to Troutnut.com by Troutnut on May 3rd, 2007.

Discussions of this Adult

Agnetina capitata
6 replies
Posted by DOS on Mar 28, 2009
Last reply on Mar 29, 2009 by GONZO
I had plans to meet a few friends tonight at a local sports bar to watch the UFC fights, but as I got out of the shower, I found that a industrious capitata had hatched in my aquarium and managed to escape its mesh canopy and was mockingly buzzing the lights in my steamy bathroom. Well, several hours later and a six pack of Saranac Black and Tan, I'm still at home and have a question. On page 37 of Schwibert's Nymphs Volume II, he diagnoses the adult at 28mm. My specimen falls more than 10mm short. Is it possible I have misidentified this specimen or is it a simple case of size variation?

Posted by GONZO on May 15, 2007
Last reply on May 15, 2007 by GONZO
Agnetina--probably capitata.

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Male Agnetina capitata (Golden Stone) Stonefly Adult Pictures

Collection details
Location: Aquarium, New York
Date: May 1st, 2007
Added to site: May 3rd, 2007
Author: Troutnut
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