Fly fisher's entomology and fly pattern field guide. Besides teaching you about major families of insects, Hughes and Hafele describe with tables when various species of insects hatch. Specific fly patterns are suggested to imitate insects. Contains 365 photos and 41 illustrations; 24 color plates demonstrate all major insect families in various stages of development as foods for trout. Fly-tying instructions are given for each. Monumental reference and educational work.