Taxonomy of the Chipmunks, Eutamias quadrivittatus and Eutamias umbrinus

"Taxonomy of the Chipmunks, Eutamias quadrivittatus and Eutamias umbrinus" by John A. White is a scientific exploration from the 20th century that identifies and classifies two species of chipmunks based on their physical differences. The study uses detailed measurements and comparisons of the chipmunks’ bodies and colors to separate them into distinct groups while tracing the history of research on these animals, improving the larger understanding of rodent species differentiation. It carefully investigates the unique traits of Eutamias quadrivittatus and Eutamias umbrinus, especially their skull shapes and color patterns, to set them apart from other chipmunks while it looks at different types of subspecies, offering clear descriptions and comparisons to show where they live in North America. The study emphasizes the importance of where and how these chipmunks live to explain how they changed and spread over time.