Adams

•   Hook:           dry fly hook size 10 to... as small as you can tie it          
•   Thread:        black 6/0 or 8/0 (based on size)
•   Tail:              hackle fibers, grizzly and brown mixed
•   Body:           muskrat or gray dry fly dubbing
•   Wing:           a pair of grizzly hackle tips  
•   Hackle:        one grizzly and one brown, mixed

The Adams is one of the most popular dry flies tied in either the Catskill form as shown above, or tied in a parachute manner in which case you would substitute a white post for the hackle tip wings.