Tricorythodes (Trico; Tiny White-winged Black; White-winged Curse. )	larva (nymph) Copyright © 2002 Jason Neuswanger	imago (spinner) - male Copyright © 2011 Ty Fitzmorris
Tricorythodes	Body tan to dark brown w/light banding; large triangular (sometimes rounded) gills on the second segment of abdomen covering the remaining gills; 3 tails w/middle tail longer; hatches before daylight.	Dun body (male) dark brown or black, (female) light green to pale gray; wings gray; legs; whitish gray; 3 tails (m) 2x body length, (f) 1x body length.
Tricorythodes explicatus

State of Washington distribution is based on:
Mayflies (Ephemeroptera) of the far western United States (Part I: Washington) by M. D. Meyer & W. P. McCafferty,
and augmented by A DNA Barcode Library for North American Ephemeroptera: etc. by Webb, Jacobus, Funk, et. al.