- Hook: TMC 100 #10 to #14
- Thread: 140 black
- Body: Black ice dubbing
- Back: 2 mm black foam
- Stripe: Chartreuse razor foam
- Legs: Black nymph sili legs
- Indicator: White sparkle emerger yarn
The x-tra terrestrial is a beetle type pattern, especially good for the cutthroat trout in the northeast corner of Yellowstone National Park.