Swimming Caddis Pupa

Hook: Your favorite brand of nymph or wet-fly hook, sizes 16 to 12.
    A curved-shank scud or pupa hook with an up-turned eye is
    another a good choice.
Weight: Small bead head or narrow lead wire.
Thread: Size 6/0 (140 denier) in your choice of color.
Abdomen: Small Stretch Tubing or a similar material used to tie the
    abdomen on nymphs and pupae. Select a color to match the
    natural insect.
Thorax: Hare’s Wiggle Dub or Swisher’s Rub a Dub. Select a color to
    match the natural insect.
Note: Select body materials in colors to match the caddisflies in
    your local trout stream or pond. You can’t go wrong using tan,
    brown, olive, and light olive. I’m making a basic pupa or emerger
    everyone can tie, but more adventuresome tiers might add wing
    buds and other features found on a real caddis pupa.