Launching a new series, Monographs in Behavior and Ecology, this work is an intensive study of five species of New World monkeys—all omnivores with a diet of fruit and small prey. Notwithstanding their common diet, they differ widely in group size, social system, ranging patterns, and degree of territoriality. Originally published in 1984. The uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.