Dr. Snodgrass is one of the most highly respected entomologists in the country, and this work carries all the authority of its author's prestige. The book describes not only the adult structure of the bee, but also the embryonic development of the organ systems, the anatomy of the larva, and the pupal metamorphosis. Physiology is in general omitted, but special attention is given to the mechanisms of feeding, flight, and egg laying. Notes on behavior are included whenever necessary to explain structure. The book is also thoroughly illustrated, many of the figures being the author's own clear and meticulous work.