Mayfly Nymph (Peter Brown) per O’Reilly’s book
Tied By Brent Jones
Hook: Partridge model A size 8
Thread: UTC 140 denier Rusty Brown
Body Parts: weighted wire, tail, rib, abdomen, wing case, thorax, legs, head
Materials: 8 wraps of .015 lead in the back, 8 wraps of .025 lead in the front to form the underbody, Bronze Mallard barbs, Uni-French small gold oval tinsel, Dark or Gray Hares Mask, Mottled Turkey Tail, Dark or Gray Hares Mask, Brown specked partridge, Thread
Notes:
Make the underbody as shown below
https://flyvault.net/wp-content/uploads/formidable/13/IMG_2481-scaled-1-150×150.jpeg