One pattern which is easy to tie and hails from the northeast is the Usual. The Usual is tied with hair from the feet of the snowshoe hare. A little bunch for the tail and a flaired bunch for the wing a la haystack. If you want an emerger pattern you don't build up the back of the wing, so it stays slanted backwards and traps bubbles of air between the wing and the body. Snowshoe hair tends to float, so it works well as a dry and you can sink it at the end of a swing or by pulling it back a bit on the surface of a pond. There are no hackles to hold the fly up, so the body sits in the film, much like an emerger would.