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
Materials-
weighted wire: 8 wraps of .015 lead in the back, 8 wraps of .025 lead in the front to form the underbody
tail: Bronze Mallard barbs
rib: Uni-French small gold oval tinsel
abdomen: Dark or Gray Hares Mask
wing case: Mottled Turkey Tail
thorax: Dark or Gray Hares Mask
legs: Brown specked partridge
head: Thread
Notes:
Make the underbody as shown below
https://flyvault.net/wp-content/uploads/formidable/13/IMG_2481-150×150.jpeg