Hiram Brobst's classic Pennsylvania caddis dry has a distinctive doubled wing — sparse wood duck flank under, deer hair over — and a palmered body. It imitates the Grannom and Spotted Sedge perfectly during spring caddis hatches.
1. Thread base — Attach olive thread behind the eye and build a base to the bend.
2. Body hackle prep — Tie in a grizzly hackle by the tip at the bend.
3. Body — Dub a slim olive body from the bend to the 2/3 point.
4. Palmer rib — Wind the grizzly hackle forward over the body in 4–5 open spirals. Counter-wind gold wire forward through the hackle to lock it. Tie off both.
5. Underwing — Tie in a sparse clump of wood duck flank fibers flat over the body, extending to the hook bend.
6. Overwing — Stack a small bunch of natural deer hair. Tie in over the underwing, angling slightly back. Tips should extend to the hook bend. Trim butts.
7. Front hackle — Tie in a brown hackle directly behind the eye. Wind 2–3 turns. Tie off and trim.
8. Head — Build a neat head. Whip finish and apply head cement.
