Snipe & purple, dark snipe, purple snipe: call it what you will, this is one of the most famous of our north country spiders. I'm not sure what exactly it is intended to imitate; the small stonefly species are the most likely candidates. But whichever way, there is no doubting that the fly is a very good catcher of trout, and particularly grayling.
I find it fishes best at either end of the season, although a very small version with waxed purple silk makes a good summer fly when the fish are smutting.
Hook: Mustad R50 #14,16,18
Silk: Pearsalls purple
Hackle: Snipe marginal covert
As previous post.