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.
Waxsmith on Jul 13, 2011July 13th, 2011, 7:24 am EDT
Most of the pictures on this site are great, however, in some cases, for instance in the case of the mayfly types it would be so great if there was some indication of average size of the depicted specimen.Mayflies in their enormous array of sizes are hard to distinguish because colour alone often will not do it.
Thanks, A.K.
What is this supposed to look like, example please.