This is someone else's pattern and post from who-knows-when, but here you go:
MAD TOM/STONE CAT
Hook-37187 size 2
Thead- anything bigger than 6/0
Weight- Large dumbbell eyes, .030 lead wire wrapped on front ¾ of shank
Tail/body topping-Magnum zonker strip. I used chinchilla color, but black, olive and dark gray also work poke a hole where you want the hook to go through, thread it through and then tie off the tip after the body is on.
Body- This is a key ingredient that gets this fly down. I use pipe cleaners from the craft store. They have metal inside which is much heavier than normal chenille. I use a tan/black variegated kind. You can also use plain chenille or any dubbing. Just make sure it doesn’t make it more buoy-ant. If you use something else, the fly wont be as heavy
Head-Coyote fur in a spinning/dubbing loop. (I was in Alaska for a family trip last summer. There were tons of furriers there. All of them sold scrap bags for about 3 bucks. The bag fills 3 gallon size Ziploc bags. It had fur of every color, length texture imaginable. I guess some furriers here in the states would have them, I’m sure you can get coyote from a fly shop too.) You can substitute and long fiber for this. I think some synthetics would fit this role nicely. Don’t use wool or deer hair. Deer hair is too buoyant, and wool soaks up too much water and makes this heavy fly even harder to cast
Tying. Tie in the eyes and lead. Tie in the pipe cleaner at the back of the hook and wrap about 2/3 up the shank. Cut a zonker strip to length and poke a hole with bodkin or hook point at the spot the hook should come through. Slip on hook. Tie down tip of zonker over the pipe cleaner. Form a spinning loop. Put coyote hair in and spin. Wrap the “fur chenille” up over and around the eyes to the hook shank and tie off. Viola!
Fishing. This is a heavy fly, use caution when casting. This is not a fly for the 6 wt. I use a rela-tively fast 8 wt for this fly.
Madtoms are a group of fish in the catfish family. They are highly seclusive and generally noctur-nal. Smallmouth find them as a delicacy and will jump all over them. If bait anglers can, they use madtoms. These fish live on the bottom, not at all in the water column. Flies should be fished ac-cordingly.
I find a variety of techniques work on this. I like fishing it in the heads and tails of riffles, just as the deeper water starts. The madtoms live in the riffles and the smallies are waiting for them. I fish it dead drift, with short spurts. Or across or down and across current. Be careful with down-stream presentations with this because it causes the fly to come off the bottom.
This fly has accounted for 2 18”ers for me just this summer. I hope you all have great luck with it too. It is definitely a big fish fly. I don’t catch dinks on it!!
And here's another:
Materials UsedHook: Gamakatsu T10-6H Up-Eye Salmon Hook Size 2 to 5/0Weight: 15 to 20 wraps of .025 lead wire on back 1/3 of shankThread: Flymaster + BlackTail: Cream or White Marabou under Dark Dun or Black Ostrich Herl under Peacock HerlBody: Cream or white Antron yarn – Aunt ydia’s craft yarn is preferredBack: Continuation of the Ostrich and Peacock used for the tailCollar: Spun Black or Dark Dun Deer Body HairHead: Spun Black or Dark Dun Deer Body Hair trimmed wide and flat Tying InstructionsI rarely tie a heavily weighted fly, but I make an exception for this pat-tern. It was meant to be fished on the bottom and its deer hair head will cause it to float if it is not weighted. I like to have this fly just on the heavy side of neutral buoyancy so it sinks slowly and I invariably fish it on a sinking or sink-tip line. I like this fly big and carry it in size 1/0 and size 2. If you have the tackle to cast it, and want to hunt for monsters, fish this fly in size 3/0 or 5/0 late at night or very early in the morning before the sun hits the water.One slight variation I make to the Troth Bullhead is in the color of the deer hair head itself. The original fly used natural gray deer body hair. I have found this fly to be a more effective Mad Tom imitation if I use black or very dark brown deer hair. This is a minor change, but one which can be significant.
I saved these a while back 'cause they looked pretty good. Never have tried them. Sorry if this post is wordy, but I hope it helps. I you try one of these paterns, let us know how they worked.
Here's an easy tie that works:
http://www.danica.com/flytier/lwilliams/modified_shenks_sculpin.htm
John