The order Trichoptera is one of the sixth largest insect orders with over 16,000 species known globally. In India, this order is represented by about 1400 species only. The literature on the caddisflies of India so far has remained scattered and fragmented. This book documents all of the 184 species of one of the largest family of Trichoptera: Rhyacophilidae. It details the taxonomic description of each species along with good-quality figures. The book will be a useful resource for studying the systematics and ecological aspects of caddisflies.