This is the same body structure as the Robert's Drake May Fly pattern. Other than that and the tail, it has characteristics of a caddis with the down wing. Maybe the fish don't care.
Mentioned that in the intro,
Originally Posted by ScottP
This version, with the deer hair body cross-wrapped with thread, shows the influence of fellow, earlier Michigan tiers - the Lacey Stephan, Kraimer's Tilt-Shoot, among others.
although I didn't specifically note the Roberts Drake