CONTENTS. 



Page. 



Introduction 5 



History and nomenclature. 5 



Vernacular names 7 



Habits 8 



BmTows 9 



Hibernation. 10 



Breeding 12 



Food 12 



Economic status 13 



Marmots as carriers of disease. 14 



External characters 15 



Pelage and molt. . 16 



Melanism 17 



Material examined and acknowledgments 17 



Explanation of cranial measurements 18 



Genus Marmoto. 18 



Groups 18 



List of American species and subspecies, with type localities 19 



Key to American species and subspecies 20 



Descriptions of American species and subspecies 21 



Marmota monax grou.-p 21 



Table of cranial measurements 35 



Marmota flaviventris group 36 



Table of cranial measurements 55 



Marmota caligata gvou-p 56 



Table of cranial measurements 72 



Explanation of plates 74 



Index 79 



3 



