Hook:Tiemco TMC2302 Size#6
Thread:Dark Brown 6/0
Bead:4mm gold/brass
Weight:Med.lead wire
Tail:Tan goose biot
Back/Wingcase:Thin Skin “Mottled Oak” color
Rib:Medium Gold wire
Abdomen:Hare’s Ear Plus Dubbin (Natural Hare’s Ear #1)
Legs: (biots, pointing back):Tan goose biot
Thorax:Hare’s Ear Plus Dubbin (Natural Hare’s Ear #1)
Rubber Legs:Sili Legs
Antennae:Tan goose biots
Mountain Anglers: Blue River
Hosted and created by Mountain Anglers; © 2008-2009
Make 3-4 wraps of lead, slide forward to the eye of the hook. Slip the bead onto the hook. Make about 8-10 wraps of lead BEHIND the eye and slide it up tight against the bead. Make several tight wraps of thread behind the lead to secure it.
Wind the thread back well onto the bend, make a small ball of thread at this point. Tie in two goose biots on either side of the ball of thread so that they flare away from the hook.
Cut a tapered pc. of the thin skin as shown. Note:there is a shiny side, and dull side to this material.
You want the dull side to face out on the finished fly, so tie it in to that it faces down. Tie in the wire ribbing material now.
Dub the abdomen a little over 1/2 the shank length as shown. With your right hand (right-handed instructions) pull the thin skin forward as shown, keeping it under some tension.
With your left hand, begin winding the gold wire ribbing forward in open wraps as shown. When you reach the lead wire, tie it off and trim the tag end.
Tie in the goose biot hind “legs” as shown~pointing back, flaring out. (one on each side) Pull the thin skin back and make several tight wraps of thread over the folded section.
This recipe is compliments of Rob O'Reily.
Dub the thorax heavily to create an almost “ball” shape. Be careful not to dub too tightly~keep it shaggy/spiky looking.
Cut 2 pcs. of rubber leg material (Sili Legs used here) and tie onto opposite sides of the thorax as shown (Do not use too much thread tension though) Start with over-sized pieces, trim to length after.

Western Stonefly Nymph

The goose biot antennae~Align the tips of 2 goose biots and open them to a “scissor” shape as shown. Tie them onto the lead wraps in front of the bead, behind the eye of the hook. Add a drop of head cement to the thread wraps, trim the tag end of the biots.
Pull the Thin Skin forward under tension and tie off over the same thread wraps from the previous step. (where the biot antennae were tied in) This can be made easier by cutting a taper in the thin skin near the tie-off point.
Your finished product.