This is a pattern we used last year for the May fly here in Ireland a marvellous wee pattern.
To dress the fly follow the following steps
step 1
1 Tie in 4 strands of cdc
Step 2
split the wing into a vee shape
step 3
Tie in a bunch of natural squirrel for the tail
step 4
tie in chartreuse thread for the rib and the body dun on natural squirrel
step 5
finally wind in a natural dun hackle tie off and varnish