Now available in a revised and updated edition, An Illustrated Guide to the Mountain Stream Insects of Colorado is a comprehensive resource on the biology, ecology, and systematics of aquatic insects found in Rocky Mountain streams. This richly illustrated volume includes descriptions of mountain stream ecosystems and habitats, simplified identification keys, and an extensive bibliography. This second edition is ideal for the naturalist, trout stream anglers interested in entomology, specialists in stream ecology, and students of aquatic entomology and freshwater biology.