Hex Mayflies
Hexagenia limbata
The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.
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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.
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Stonefly Genus Taenionema (Willowflies)
Genus Range
Specimens of the Stonefly Genus Taenionema
1 Adult
1 Male Adult
2 Nymphs
This specimen was the only one of its kind in my kick net sample from this small creek. At first I thought it was Nemouridae, but it's not. Unfortunately, there is no species key available for Taenionema nymphs. Potential species found in Washington include nigripenne, oregonense, pacificum, and pallidum.
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Stonefly Genus Taenionema (Willowflies)
Taxonomy
Species in Taenionema
Taenionema atlanticumAtlantic Willowflies
1
8
Taenionema pacificumPacific Willowflies
2
4
Taenionema umatillaUmatilla Willowflies
0
0
9 species (Taenionema californicum, Taenionema grinnelli, Taenionema jacobii, Taenionema jewetti, Taenionema kincaidi, Taenionema oregonense, Taenionema pallidum, Taenionema raynorium, and Taenionema uinta) aren't included.