Big Hole Demon (Light)
Hook - Mustad 9761, 9762 or equivalent
Thread - Black
Tail - Grizzly or badger hackle tips (2, divided)
Ribbing - Oval silver tinsel
Body - Flat silver tinsel
Thorax - Black chenille or peacock herl
Hackle - Grizzly or badger hackle palmered over thorax
Big Hole Demon (Dark)
Hook - Mustad 9671, 9672 or equivalent
Thread - Brown
Tail - Furnace or dark brown hackle tips (2, divided)
Ribbing - Oval gold tinsel
Body - Flat gold tinsel
Thorax - Brown chenille
Hackle - Furnace or dark brown hackle palmered over thorax
Montana Trout Flies by George F Grant