Griffiths Gnat Midge Trout Dry Fly Fishing Flies - 1 Dozen Flies Size 18The Griffith's Gnat is one of the essential Midge dry flies of all time! Excellent high mountain lakes and still water fishing fly pattern This classic favorite dry fishing fly is perhaps one of the adult midge flying aquatic insect imitations ever tied Excellent trout, bass or panfish flies Set of 12 Flies Hook Size 18 Try these midge flies when trout are rising, but are refusing dry fly offerings