6 



ILLUSTEATIONS. 



Page. 



Fig. 6. Map showing distribution of certain species and subspecies of Thomo- 



mys: 1, bottae; 2, minor; 3, laticeps; 4, leucodon,\ 5, navus; 6, mewa; 7, 

 pascalis; 8, angularis; 9, diaboli; 10, infrapallidus; 11, pallescens; 12, 

 alpinus; 13, awahnee; 14, neglectus; 15, altivallis; 16, jacinteus; 17, 

 cabezonx; 18, puertx; 19, perpallidus; 20, albatus; 21, perpes; 22, 

 0 per arius; 2^, fisher i 24 



7. Map showing distribution of certain species and subspecies of Thomo- 



mys: 1, apache; 2,fulvus; 3, toltecus; 4, desertorum; 5, texensis;6, baileyi; 

 7, mearnsi; 8, lachuguilla; 9, cervinus; 10, sinalox; 11, chrysonotus; 

 12, nigricans; 13, martirensis; 14, russeolus; 15, magdalenx; 16, anitx; 

 17, alticolus 25 



8. Map showing distribution of certain species and subspecies of Thomo- 



mys: 1, fossor; 2, agrestis; 3, pervagus; 4, desertorum; 5, aureus; 6, 

 latirostris; 7, chrysonotus; 8, cervinus; 9, intermedius 26 



9. Map showing distribution of certain species and subspecies of Thomo- 



mys: 1, umbrinus; 2, orizabx; 3, peregrinus; 4, atrovarius; 5, sheldoni; 



6, nelsoni; 7, goldmani; 8, perditus. 27 



10. Map showing distribution of certain species and subspecies of Thomo- 

 mys: 1, talpoides; 2, rufescens; 3, buUatus; 4, nebulosus; 5, clusius; 6, 

 can/i; 7, pryori; 8, idahoensis; 9, pygmxus; 10, oaits 28 



