Gill-Ribbed Caddis Larva

I have recently been reading The Caddis and the Angler by Larry Solomon and Eric Leiser.  On page 60 they describe a gill-ribbed larva.  Here is my version.

gilled caddis

Gilled Caddis Larva

I have tied several of these and plan to try them on the Spring River this Spring.  The flies are easy to tie and imitate the Hydropsyche larva.  My son and I have collected many of these larva on the Spring.  The fly is tied on a size 14 hook with a grey-blue floss body with a rib of peacock herl palmered up the body.  The herl is tied off and the remainder is used to form a thorax.  The fly is finished with a thread head.