The Black Stonefly can fool even the spookiest trout. This effective pattern has a segmented abdomen, rubber legs, antenna and tail filaments and a shiny shellback. Tied with long guard hairs, the body pulses underwater making it look alive. Per 12. Sizes: 8, 10, 12. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Fly Assortments.