Hi Steve,

I see that Peregrines has suggested Murray's Hellgrammite...I'll second that one. I've caught a lot of big bass on that fly.

If it's bass you're after, tie a few of these (I think they're called Sparkle Grubs).

Hook: #6 Streamer
Eyes: Nickel Dumbell
Weight: wraps of .020 lead wire (optional)
Thread: Brown 6/0
Tail: Brown marabou with rootbeer krystal flash (3 strands/side)
Body: root beer cactus chenille

This is also effective in white, black, and olive (change tail, flash, and body colour accordingly).

Tie it just as you would a Wooley Bugger. Fish it slowly along the bottom and hold on. Last year I caught a 21.5" smallmouth on that fly. It's my favourite fly for bass.

Good luck,