Here is the fly pattern sheet for the March Brown Mayfly Cripple. It can also be used to imitate the Cinygmula mayfly dun.
Here is a picture of the real Cinygmula dun.
Materials
Hook:
Daiichi 1180, TMC 100 #12 – 16 or any dry fly hook
Thread:
70 denier Danville brown (6/0)
Tail:
Zelon – mayfly brown
Body:
Superfine dubbing – march brown
Wing:
EP Trigger Point Fibers – light or medium dun
Hackle:
Medium brown
Directions:
- Attach thread to hook behind hook eye and wind backwards about halfway.
- Tie in Zelon and hold upwards and on top of hook while continuing to wrap thread to hook barb.
- Add dubbing to thread and wind forward until 2/3 point.
- Tie in wing material, allowing materials to extend over hook eye. Wrap tightly as materials are slick. Cut rear section and leave small tuft.
- Tie in hackle. Place 3 wraps behind wing and lift wing material up and place 2 wraps in front. Tie off hackle and cut excess.
- Whip finish.
- Trim tail 2/3 body length.
- To trim wing, pull wing back and trim at end of body.
- Trim hackle bottom even with hook point to allow low profile in water.
This fly pattern can be used to imitate a March Brown or Cinygmula mayfly.