White Miller This post was last updated on February 19th, 2019 at 06:30 pmEphoron leukon (aka the White Miller) Pattern The White miller Dry Fly is a representation of (Ephoron leukon) the white mayfly that hatches in a lot of areas. It is also a good general “attractor” pattern to use when there is no hatch. The brook trout really love this fly.