Tie off and trim excess . Tie off and trim excess . Tie in one long fibre badger hackle. Wrap 2-3 times and tie off. Trim excess .
Whip finish the head and cement .
Once the pupa cuts its way out of the cocoon it immediately heads for the surface using its swimmerets to propel itself. The swimmerets pump like little oars and give the insect a very distinctive fast, pumping motion. In rivers you can use short down and across casts, allow the fly to sink a bit and then use the drag of the current to draw the fly to the surface like the natural. In either case hang onto your rod because the trout usually hit the rising pupa hard. Once at the surface the pupa immediately cuts its way out of the pupal shuck and emerges as the adult sedge.