Pocketguide to Western Hatches

This book includes 90 hatches including mayflies, stoneflies, caddisflies, midges, and terrestrials -- stillwater and creek, stream, and river hatches.   

It has key features, habitat, hatch times, and fishing hints for each insect along with 169 fly patterns in Washington, Idaho, Montana, Oregon, Wyoming, California, Nevada, Utah, Colorado, Arizona, New Mexico, British Columbia, and Alberta.