Just as the title says. This is basically just a huge griffith's gnat. It can be fished dry, but I've found that wild trout go nuts for this when fished wet (that's why I don't use a dry fly hook).
Hook: Orvis 1639 size 12
Body: Peacock hearl
Hackle: Grizzly
Hook: Orvis 1639 size 12
Body: Peacock hearl
Hackle: Grizzly