This is my preferred method of tying the Rhyacophila. This is a slightly abridged sbs see Rhyacophila (Furry Foam) (http://www.wildfisher.co.uk/smf/index.php?topic=7446.0) for an alternative method and for additional information.
I have also tied this one on a different hook.
Instructions assume right-handed tyers.
HOOK ? Partridge YK12ST #12
THREAD ? Black Benecchi 8/0
WEIGHT ? Self Adhesive Lead Foil (two layers at the thorax)
RIB ? 3 or 4lb Nylon
BACK ? Flexibody
BODY ? Master Class SLF #10 (Rhyacophila pupa)
THORAX ? Mink
STEP 1
Wrap the lead, cover with thread wraps, then tie in the rib.
(http://i52.photobucket.com/albums/g8/scotfly/flies/DubbedRhyac-1.jpg)
STEP 2
Prepare and tie in the flexibody.
(http://i52.photobucket.com/albums/g8/scotfly/flies/DubbedRhyac-2.jpg)
STEP 3
Apply a liberal amount of dubbing to the thread.
(http://i52.photobucket.com/albums/g8/scotfly/flies/DubbedRhyac-3.jpg)
Then wrap to form a tapered body.
(http://i52.photobucket.com/albums/g8/scotfly/flies/DubbedRhyac-4.jpg)
STEP 4
Split the thread and insert the mink dubbing. Try to have a few guard hairs in the dubbing mix.
(http://i52.photobucket.com/albums/g8/scotfly/flies/DubbedRhyac-5.jpg)
STEP 5
Spin the bobbin to form the dubbing rope then wrap to form the thorax.
(http://i52.photobucket.com/albums/g8/scotfly/flies/DubbedRhyac-6.jpg)
STEP 6
Pull the shellback over and tie off at the head.
(http://i52.photobucket.com/albums/g8/scotfly/flies/DubbedRhyac-7.jpg)
STEP 7
Follow with the rib and tie off.
(http://i52.photobucket.com/albums/g8/scotfly/flies/DubbedRhyac-8.jpg)
STEP 8
Finally form a neat head, whipfinish and varnish for the completed fly.
(http://i52.photobucket.com/albums/g8/scotfly/flies/DubbedRhyac-10.jpg)
(http://i52.photobucket.com/albums/g8/scotfly/flies/DubbedRhyac-11.jpg)