Aquatic Biology and Natural History are subjects of interests to many, whether they be related to one's vocational education, one's avocation, or purely to one's appreciation for the living order of the world. This book has been written not only for entomologists, ecologists, and students of aquatic entomology, but also for sport fishermen, naturalists, and environmental assessment specialists. For those who may not have some vested interested in nature and ecology, this book will provide a pictorial introduction to some of the most fascinating life forms on earth and, hopefully, wet the appetite for understanding the aquatic insects, their environment, and their relationship to human life.