Imitation.

Body.—Light reddish-brown floss silk, ribbed with purple.

Tail.—Three whisks of a light dun hackle.

Wings.—From a feather of the robin’s wing, or the under feather of a young grouse’s wing.

Legs.—A light dun hackle.

No. 21. The Yellow Sally.

This is a water fly, which continues in season for four or five weeks from the middle of May. Its wings are transparent, and lie close and flat. It is sometimes called “the flat yellow.”

Imitation.

Body.—Yellow mohair, ribbed with pale green silk thread.

Wings.—White pigeon wing, stained a pale greenish yellow.