136 



NORTH AMEEICAN FAUNA. 



[NO. 39. 



Thomomys pallescens, 55. 

 pascalis, 54. 

 perditus, 95. 

 peregrinus, 91-92. 

 perpallidus, 68-69. 

 perpes, 72-73. 

 pervagus, 82-83. 

 piaetorum, 124-125. 

 premaxillaris, 124. 

 pryori, 104-105. 

 puertse, 58-59. 

 pygmaeus, 109-110. 

 quadratus, 114-115. 

 rufescens, 98-99. 

 msseolus, 60-61. 

 saturatus, 128. 

 scapterus, 72. 

 sheldoni, 93-94, 

 sinalose, 80. 

 talpoides, 96-98. 

 texensis, 85. 

 toltecus, 86. 

 townsendi, 42-43. 

 Uinta, 113-114. 



Thomomys umbrinus, 89-90. 



yelmensis, 118-119. 

 toltecus, Thomomys fulvus, 86. 

 townsendi, Thomomys townsendi, 42-43. 

 townsendii, Geomys, 42, 43. 

 Type localities, list, 34-36. 



TJ. 



Uinta, Thomomys, 113-114. 

 umbrinus, Geomys, 89. 



Thomomys umbrinus, 89-90. 

 unisulcatus, Geomys, 97. 



Variation, 22. 

 sexual, 17. 



Winter habits, 11. 



W. 



Y. 



yelmensis, Thomomys douglasi, 118-119„ 



Zygogeomys, 7. 



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