This reference book comprehensively delves into the systematics, taxonomy, morphology, ecology, and behaviour of the Lepidostomatidae (Trichoptera) in India. The chapters cover biogeography and distribution patterns, conservation status, functional traits, and management of Lepidostomatidae. The book also provides insights into the morphological and molecular techniques employed for identification, allowing for a deeper understanding of the intricate characteristics that define the caddisflies. The work examines detailed methods for the collection, preservation, and identification of Lepidostomatidae specimens. It also examines the threats faced by Trichoptera, particularly Lepidostomatidae, and sheds light on the challenges that endanger their survival in the current scenario of climate change. In the final section, the book explores the crucial roles Lepidostomatidae played in aquatic ecosystems. This book is useful to upper undergraduate and graduate students, academicians, and researchers of entomology, zoology, and environmental sciences.