Using a SKALKA WN1#12 hook add a 3mm tungsten bead and put several wraps of flat lead behind the bead.
Tie on some primrose tying thread and add in some Coq de Leon for the tail.
Bring the thread up the hook slightly to leave a primrose butt and add in Hends Body Quill Olive, then bring the thread up to the bead.
Wrap the Hends Body Quill up the hook putting a second layer nearer to the thorax so the body is from light to dark.
Add in some cream flat foam as the thorax cover.
Using Hends Olive CDC dubbing form the thorax and brush out slightly.
Bring the foam over the CDC, tie off and remove the waste. Put a very small pinch of CDC dubbing on the thread and wrap it just behind the bead to finish off the fly and whip finish.