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Photo#199616
Ephemeroptera 01 - Paraleptophlebia

Ephemeroptera 01 - Paraleptophlebia
Curlew, Ferry County, Washington, USA
June 23, 2008
Found on the bark of a Cottonwood in the early evening

Probably...
a male subimago of the genus Paraleptophlebia. I can't see the hindwing as well as I'd like, but it appears to be small, ovoid, and lacking pronounced costal angulation. Most of the members of this genus that I know tend toward more of a dark reddish brown body color, but I'm not familiar with some of the Western species of this genus.

 
Paraleptophlebia heteronea
There's no size mentioned but the date of emergence suggests P. heteronea (Western Blue Quill). It's a fairly common though sporadic late Spring/Summer emerger on many western waters. I've run into this grayish look quite a bit in some locales.

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