If you are lucky enough to fish The Ranch in Montana you will also be able to see how picky the fish are. This fly was invented by Rene Harrop a USA Fly Fisher and fly Tier - problem solved. When Caddis hatches are happening and particularly our Snow Flake Caddis this emerging pupa fly is what they are eating. This is also a relatively new pattern for The Fly Shop and has had great success on the Goulburn River. Both green and brown versions are tied on barbless hooks as are most American flies.
Daves Tip. It's meant to be fished sub surface spit on It . This is a pre emerger pattern.