1Introduction
4Taxonomy of the Chipmunks, Eutamias quadrivittatus and Eutamias umbrinus
2The Baculum in the Chipmunks of Western North America
5Geographic Distribution and Taxonomy of the Chipmunks of Wyoming
3Genera and Subgenera of Chipmunks
6A New Chipmunk (Genus Eutamias) from the Black Hills