The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.
Like most common names,"Slate Maroon Drake" can refer to more than one taxon. They're previewed below, along with 4 specimens. For more detail click through to the scientific names.
This large dark mayfly is one of the most unusually colored insects to hatch on Western streams, for its sternites are a reddish maroon.