Description:This is a comprehensive resource on the biology, ecology, and systematics of aquatic insects of Rocky Mountain streams. This richly illustrated and up-to-date volume includes descriptions of mountain stream ecosystems and habitats; simplified identification keys to the insects of Colorado Mountain streams; clear, well-labelled drawings; and an extensive bibliography. Species' distributions by drainage basin are provided for mayflies, stoneflies and caddisflies, the three orders for which such data are available.