Produced by Chris Curnow, Erica Pfister-Altschul, Joseph Cooper and the Online Distributed Proofreading Team at https://www.pgdp.net [Transcriber's Notes: The following change has been made to the text: Page 631, added closing parenthesis to "(genus Eutamias of California)"] The Baculum in the Chipmunks of Western North America BY JOHN A. WHITE University of Kansas Publications Museum of Natural History Volume 5, No. 35, pp. 611-631, 19 figures in text December 1, 1953 University of Kansas LAWRENCE 1953 UNIVERSITY OF KANSAS PUBLICATIONS, MUSEUM OF NATURAL HISTORY Editors: E. Raymond Hall, Chairman, A. Byron Leonard, and Robert W. Wilson Volume 5, No. 35, pp. 611-631, 19 figures in text December 1, 1953 UNIVERSITY OF KANSAS Lawrence, Kansas PRINTED BY FERD VOILAND, JR., STATE PRINTER TOPEKA, KANSAS 1953 [Illustration] 24-8968 The Baculum in the Chipmunks of Western North America By JOHN A. WHITE CONTENTS PAGE Introduction 613 Methods, Materials, and Acknowledgments 614 Variation 614 Key to the Bacula of the Species of Eutamias of Western North America 615 Accounts by Species 616 _Eutamias alpinus_ 616 _E. minimus_ 617 _E. townsendii_ 618 _E. sonomae_ 619 _E. amoenus_ 619 _E. dorsalis_ 620 _E. merriami_ 621 _E. quadrivittatus_ 621 _E. ruficaudus_ 622 _E. cinereicollis_ 624 _E. quadrimaculatus_ 624 _E. speciosus_ 625 _E. panamintinus_ 625 _E. umbrinus_ 626 _E. palmeri_ 627 _E. bulleri_ 627 Figures 1-19. Lateral views of bacula 629 Discussion 630 Literature Cited 631 INTRODUCTION