ILLUSTRATIONS. 



PLATES. 



[Plate I, frontispiece; Plates II-XV, following page 77.] 



Plate I. Golden-mantled marmot (JiV wo to flaviventris nosophora) . 



II. Skins of Marmota olympus and M. flaviventris obscura, showing molt. 



III. Hind feet of American marmots, showing sole pads. 



IV. Crania and mandibles of Marmota flaviventris dacota, M. monaxmonax, M. cali- 



gata oxytona, M. flaviventris sierrae, M. monax rufescens, and M. caligata 

 caligata. 



V. Skulls (upper views) of Marmota monax monax, M. monax rufescens, M. 

 monax prehlorum, and M. monax ignava. 

 VI. Skulls (upper views) of Marraota monax canadensis, M. monax petrensis, M, 

 monax ochracea, and M. flaviventris warreni. 

 VII. Skulls (upper views) of Marm.ota flaviventris flaviventris, M. flaviventris 

 parvula, M. flaviventris avara, and M. flaviventris engelhardti. 

 VIII. Skulls (upper views) of Marmota flaviventris nosophora, M. flaviventris 

 luteola, M. flaviventris dacota, and M . flaviventris ohscura. 

 IX. Skulls (upper views) of Marmota olympus, M. caligata oxytona, 31. van- 



couverensis, and M. caligata caligata. 

 X. Skulls (upper views) of Marmota caligata cascadensis, M. caligata nivaria, M. 

 caligata okanagana, and M. caligata oxytona. 

 XI. Skulls (lower \T.ews) of Marmota monax monax, M. monax rufescens, M. 

 monax prehlorum, and M. monax canadensis. 

 XII. Skulls (lower views) of Marmota monax ignava, M. flaviventris warreni, M. 

 monax ochracea, and M. caligata nivaria. 



XIII. Skulls (lower views) of Marmota flaviventris flaviventris, M . flaviventris par- 



vula, M. flaviventris avara, and M. flaviventris engelhardti. 



XIV. Skulls (lower views) of Marmota flaviventris nosophora, M. flaviventris 



dacota, M. flaviventris luteola, and M. flaviventris ohscura. 

 XV. Skulls (lower views) of Marmota olympus, M. vancouverensis, M. caligata 

 caligata, and M. caligata cascadensis. 



TEXT FIGUKES. 



Page. 



Fig. 1. Distribution of the Marmota monax group. 23 



2. Distribution of the Marmota flaviventris g^:owp 38 



3. Distribution of the Marmota caligata group. 58 



4 



