xiv ILLUSTRATIONS IN THE TEXT. 



Fig. Page. 



45. Synaptomys cooperi 204 



46. Synaptomys (Mictoniysi iiinuitus 205 



47. Lemmus trimucronatus 208 



48. Dicrostonyx hudsonius nelsoni 210 



4Q. Fiber zibethicus 212 



50. Geoniys tuza 216 



5 1 . Cratogeomys castanops 221 



52. Thomomys bottae 222 



53. Didpodomys merrianii 232 



54. Perodipus agilis 237 



55. Microdipodops megacephalus 240 



56. Perognathus flavus 242 



57. Perognathus (Chaetodipus I femoralis 251 



58. Heteromys alleni 256 



59. Zapus hudsonius 258 



60. Napeozapus insignis 263 



61. Ochotona princeps 267 



62. Procyon lotor 318 



63. Taxidea americana 320 



64. Mephitis mephitica 323 



65. Spilogale putorius 328 



66. Mustela americana 334 



67. Putorius (Leuteola) vison 339 



68. Putorius (Cynomyonax) nigripes 342 



69. Putorius (Arctogale) cicognani 343 



70. Sorex montereyensis 367 



71. Microsorex hoyi 377 



72. Neosorex palustris 378 



73. .\tophyrax bendirii 380 



74. Blarina brevicauda 382 



75. Blarina (Cryptotis) parva 384 



76. Xotiosorex crawfordi 386 



77. Xeiirotrichus gibbsi 387 



78. Scalops aquaticus 389 



79. Scapanus townsendi 392 



80. Parascalops breweri 394 



81. Condylura cristata 395 



82. Antrozous pallidus 397 



83. Corynorhinus townsendi 399 



84. Myotis lucifugus 401 



85. Lasionycteris noctivagans 407 



86. Pipistrellus hesperus 408 



87. Vespertilio fuscus 411 



88. Lasiurus borealis 4 ' 2 



89. Dasypterus intermedius 414 



90. Nycticejus humeralis 415 



91. Nyctinomus brasiliensis 416 



92. ^lormops blainviliii 419 



93. Otopterus mexicanus 420 



94. Promops californicus 422 



