An important book on the social insects which summarizes and integrates a large amount of scattered knowledge and erects guideposts for future research. In comprehensiveness of scope and modernity of outlook [it is] unique. Illustrated, with an index and chart comparing bumblebees of North and Central America. Includes an Index.

(Key Words: Biology, Insects, Bumblebees, Social insects, Biochemistry, Science, Bernd Heinrich, Entomology, Aggression, Behavior, Competition, Flight, Mating, Nectar, Pollen, Nest, Sting ).