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
Wing:
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
Rib:
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