Byron,

been tying something similar to this since around 2001,

hook: dairiki 125
thread: light brown
abdomen; olive snow shoe
wing: light dun snowshoe
head:brown superfine dubbing

vary the abdomen color to match the hatch. this one is for American grannom. use insect green superfine dubbing for abdomen to match green caddis, and amber superfine or tan snowshoe dubbing for tan caddis.

floats like a cork