Articulated Hellgrammite Fly Pattern is a intermediate pattern that works wonders for catching Small Mouth Bass.
In this fly tying tutorial by www.HolsingersFlyShop.com Shawn will show us how to tie a Hellgrammite pattern that he had come up with.
Hellgrammites are really large bugs that Smallies just go crazy for, but you can catch other panfish on them as well.
Shawn uses a product called Fish Skulls and it is the spines used to make articulated flies, however you may be able to achieve this articulation using regular Mono fish line.
The Articulated Hellgrammite actually looks harder to tie than it is but you still need some sort of experience with fly tying.