The CDC Midge Emerger is a dynamite small pattern originated by Shane Stalcup. Tied by Hans Stephenson of Dakota Angler & Outfitter in Rapid City, South Dakota. The CDC soft hackle give the fly movement and traps air bubbles that mimic an emerging midge pupa. Fish this pattern deep behind a copper john. It can also be fished below the surface behind a dry fly such as a parachute adams.