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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.

Dorsal view of a Kogotus (Perlodidae) Stonefly Nymph from Mystery Creek #199 in Washington
This one pretty clearly keys to Kogotus, but it also looks fairly different from specimens I caught in the same creek about a month later in the year. With only one species of the genus known in Washington, I'm not sure about the answer to this ID.
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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This topic is about the Mayfly Species Eurylophella temporalis

Example specimens

Posts: 1
Homer47 on Sep 5, 2012September 5th, 2012, 5:06 pm EDT
Looks like an imitation would be about a #10 or #8 dark brown nymph pattern. I'm down here in north Fla and trying to match the hatch in the far north central part of the state, mostly to fool the bream. Any ideas or help would be appreciated. I found two patterns so far that seem to work- a little brown nymph with a rusty brown/orange thorax(maybe this is a good representation of the E. Temporalis), and a size 12 buzzer nymph with black body, peacock thorax and white breathing filament. The bream seemed to agree with that choice. I would like to try and copy more local insects as I figure out what they are.There are dragonflies and damselflies and mosquitoes. I could start there.
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Site Editor
Plano, TX

Posts: 1311
Taxon on Sep 5, 2012September 5th, 2012, 6:11 pm EDT
Hi Homer47-

Welcome to the forum, and congratulations on your first post. At 10-11 mm, mature Eurylophella temporalis nymph would be more like size #12. Good luck with your experimental development of patterns to attract Bream, and be sure to keep us posted.
Best regards,
Roger Rohrbeck
Posts: 560
Sayfu on Sep 5, 2012September 5th, 2012, 10:12 pm EDT

I'm bettin a standard nymph shape such as a Hare's Ear with small diameter rubber legs does the trick on Bream.

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