Produced by Chris Curnow, Joseph Cooper, Anne Storer and the Online Distributed Proofreading Team at http://www.pgdp.net Genera and Subgenera of Chipmunks BY JOHN A. WHITE University of Kansas Publications Museum of Natural History Volume 5, No. 32, pp. 543-561, 12 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. 32, pp. 543-561, 12 figures in text December 1, 1953 UNIVERSITY OF KANSAS Lawrence, Kansas PRINTED BY FERD VOILAND, JR., STATE PRINTER TOPEKA, KANSAS 1953 Genera and Subgenera of Chipmunks By JOHN A. WHITE CONTENTS PAGE Introduction 546 Historical 546 Methods, Materials, and Acknowledgments 547 Evaluation of Characters 548 Characters in which the Subgenera _Eutamias_ and _Neotamias_ Agree, but Differ from the Genus _Tamias_ 548 Structure of the Malleus 548 Structure of the Baculum 549 Structure of the Hyoid Apparatus 552 Presence or Absence of P3 553 Length of Tail in Relation to Total Length 553 Color Pattern 554 Characters in which the Subgenus _Eutamias_ and the Genus _Tamias_ Agree, but Differ from the Subgenus _Neotamias_ 554 Shape of the Infraorbital Foramen 554 Width of the Postorbital Process at Base 554 Position of the Supraorbital Notch 554 Degree of Convergence of the Upper Tooth-rows 554 Degree of Constriction of the Interorbital Region 555 Shape of the Pinna 555 Structural Features that are too Weakly Expressed to be of Taxonomic Use 555 Discussion 555 Genera and Subgenera 557 Genus _Eutamias_ Trouessart 557 Subgenus _Eutamias_ Trouessart 558 Subgenus _Neotamias_ Howell 558 Genus _Tamias_ Illiger 559 Discussion 559 Conclusions 560 Literature Cited 561 ILLUSTRATIONS Figs. 1-3. Dorsomedial Views of Malleus 549 Figs. 4-10. Lateral Views of Baculum 551 Figs. 11-12. Ventral Views of Hyoid Apparatus 552 INTRODUCTION