Charlie,

by the picture I'm guessing your looking for kelso's red ***,which I have found to be very effective during the green caddis hatch. the red tag imitates the red egg sack of the adult egg layer. another effective pattern is a green butt,same fly just with a green tag. very effective during the American grannom hatch. the green butt imitates the green egg sack of the egg laying adult.

the white river in Arkansas just experienced a massive green caddis and American grannom hatch.it started in mid February and lasted till the end of april when we started to experience high water. at present bull shoals lake level is elev 692 and change , we were at 649 and change in early april. the white river is now experiencing high flow rates, to the tune of 25,000 cfs of water. wadable water is in the 2,500cfs and less rate. these high flow rates will continue for the for seeable future.