Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.
...are there any pale Rhithros?
Why not Ecdyonurus?
I see mimus and par listed by W&K 1992 as having been collected in my watershed. Love to know more about them.
ramaleyi is described, (and seen in Jason's images), as rusty dun, rather than cream. Might they darken that much?