The Triple Threat Caddis, originated by Jim Slattery, is an excellent general purpose caddis pupa imitation.
http://www.danica.com/flytier/hweile...eat_caddis.jpg
Video here - please view in hi rez, if able:
http://www.youtube.com/watch?v=c-5CmfGbkBI
Cheers,
Hans W