X TABLE OF CONTENTS. 



Mammals of the Mexican Boundary Region — Continued. Page. 



Peromyscus eremicus fraterculus 436 



anthonyi 438 



arenarius 441 



merriami 443 



tiburonensis 444 



Genus Sigmodon 446 



minimus 446 



hispidus texianus 448 



berlandieri 449 



arizonse 450 



eremicus 451 



Genus Oryzoniys 454 



palustris texensis 454 



aquaticus -• 455 



Genus Reitiirodontomys 456 



Key to Reithrodontomys found on the Mexican Boundary 457 



Reithrodontomys mexicanus intermedins 457 



laceyi 458 



f ul vescens 459 



arizonensis 459 



megalotis 460 



deserti 462 



longicauda .- 464 



Genus Neotoma 467 



Key to the species and subspecies of Neotoma found on the Mexican Boun- 

 dary 468 



Neotoma floridanaattwateri 469 



micropus 470 



canescens 471 



cumulator 472 



venusta 475 



albigula 476 



angusticeps 482 



intermedia 484 



gilva 486 



desertorum 487 



f uscipes macrotis 488 



pinetorum , _ 490 



mexicana 49I 



bullata 491 



Neotoma bella 492 



Stephens! _ 493 



Genus Fiber 494 



zibethicus pallidus 494 



ripen^s 497 



Genus Microtus 498 



californicus 498 



montanus arizonensis 500 



alticola 500 



leucophseus 5OO 



mogollonensis 501 



mexicanus guadalupensis 501 



Index 503 



