PMD CDC Emerger
By: Rene Harrop. But I have made my changes to it.
Hook: TMC 206BL
Size: 16 ~ 20
Thread: Yellow 8/0 UNI-Thread
Optional Weight: Lead-Small
Tail: 3 Wood Duck Fibers
Rib: Fine Copper Wire
Abdomen: Rusty/Olive Caddis Emerger Dubbing
Wingcase: 2 Paired CDC Feathers, Dyed Yellow
Thorax: Cream/Yellow PMD Dubbing
Legs: Butts Of CDC Wing Tied Back Along Body
Head: CDC Wing Butts		  
Step Tying Instruction
1 Lay thread base to tail area. Lead Weight (optional)
2 Attach wood duck tail, 3/4 hook in length.
3 Tie in copper wire.
4 Dub tapered abdomen to just past 1/2 body.
5 Spiral copper wire through abdomen. Trim.
6 Tie in 2 CDC feathers, at base of abdomen, trim butts, leaving remainder of feathers back over abdomen.
7 Dub large PMD thorax. Stop one eye length short of eye.
8 Fold CDC feathers forward forming "bubble" wing case, tie down with a few wraps.
9 Allow a few fibers to fall to each side, forming legs sets, trim them to 1/2 body length.
10 Trim remaining CDC wing case as head and whip finish. Add head cement to complete.

Fishing Instructions:
Fish this fly as a trailer off a strike indicator fly. Because it's an emerger it's most effectively fished just below the surface during a hatch.

It's also effectively fished near the bottom and lifted towards the surface "ala" emerger style.
Fish fly down tail-outs with a quick lift at the end of the drift causing the fly to lift rapidly as if emerging to hatch as a dun.

This is especially true at the beginning of the mayfly emergence, and before they are seen in great numbers.

Note:
In British Columbia, they do not allow for a second (strike indicator fly) when fly fishing. Only a one fly rig is allowed, with no suggestion of a strike indicator of any type. Use a shorter leader and use a "sink" type application on the fly to help it break the water's surface tension and get the fly below a few inches. Weighted flies do help in B.C. and you should have them in your box.