Here is the fly pattern sheet for the Lempke Extended Body Green Drake fly.

Photo: Courtesy of Sandy Pittendrigh (http://flies.montana-riverboats.com/?page=Bing-L)
Materials | |
Hook: | Mustad 7957B or equivalent #12 |
Thread: | Black nylon 2/0 |
Wings: | Goose Primary sections with rounded tips |
Tail: | Extension of three black monofilament fibers, 0.006″ diameter, secured along hook shank to form beam |
Underbody: | Art foam strip, 3/8″ wide, wrapped along shank and up beam |
Egg sac: | Two peacock herl fibers |
Ribs: | Size A yellow nylon |
Body: | Peacock olive floss |
Hackle: | One each grizzly neck hackle dyed yellow and blue dun |
Fly pattern from Snake River Country – Flies and Waters (1991) by Bruce Staples