SynopsisIn publication since 1978, the fourth edition is the standard guide to the aquatic and semiaquatic insects of North America. NEW FEATURES An interactive key to aquatic insect orders is on a CD included with each book. Over 3,200 photos and illustrations assist with insect identification. Features 45 contributing authors and over 6,000 references. Includes color photographs of the majority of insect families. The ecological tables for each order have been updated, revised, and expanded to include US EPA tolerance values. Click here to download errata sheets for this title.