This is just like palmering the rib on the Hare's ear, Prince and Pheasant Tail Nymphs. Also just like palmering hackle on Caddis fly.

Slowly palmer peacock rib material forward to end of floss body in evenly spaced turns.

Should take about 5 or 6 wraps depending on size of fly.

When you get to the end, tie off floss with about three tight wraps of thread.
Cut off excess floss and secure with 5 or 6 wraps of thread.

Palmer thread back over body and rib material to reinforce these delicate materials.

I love it when a plan comes together! This reinforcing will help prevent material unraveling when that 15 " brown tears into it.