Agostino Roncallo, one of the world’s most proficient proponents of tying with CDC who has written two sumptuous books on the subject, kindly sent this interesting pattern:

I would like to demonstrate an imitation of a wasp that is in my book Magic in CDC.

It is easy to tie and excellent for catching trout. I use it now, in the summer, fishing it near the banks of streams. Often, trout or chub, alerted by the light blow that the fly gives as it lands on the water, appear as if by magic from beneath the grassy banks to take it.

Click in images to enlarge

Step 1    Tie a strip of foam on the curve of a hook grub.

Step 2    Tie in three peacock herls.

Step 3    Twist the herls and the wrap around the shank of the hook, creating the abdomen.

Step 4    Pull the strip of foam forward to form the abdomen.

Step 5    Tie in a CDC hackle

Step 6    Wrap the hackle around the foam strip, fix it to the hook shank and trim off the excess

Step 7    Wrap the peacock herl forward around the shank of the hook.  Tie it off and trim the excess.

Step 8    Bring the foam strip over the peacock herl, trap it with thread on top of the hook shank and trim the excess.

Step 9    Tie off the foam as shown with a whip finish tool.

Step 10  The head of the wasp is trimmed out from the foam and then coloured with a black permanent marker.

The final product!

(See Agostino’s latest book at http://www.tomsutcliffe.co.za/fly-fishing/fly-tying/item/717-new-book-on-tying-with-cdc.html )