No. 11 The Gravel Bed, or Spider Fly
This fly is found only in running waters, but where it is found it is very numerous. It may be used all day, and is a very delicate fly. It will raise fish in clear water when no other fly will.
Imitation
Body.—Lead-colored silk thread, with which the fly is tied. Fine and thin.
Wings.—From an under covert feather of the wood-cock’s wing. To lie flat.
Legs.—Two turns only of a black hackle.