34 



NORTH AMEKICAN^ FAUNA. 



[No. 40. 



ranges. In the Bear Spring Mountains, New Mexico, in 1905, I saw 

 one nearly pure-white animal of this species. Bailey reports finding 

 a mixed colony of individuals of this form and of C. ludovicianus 

 near Pecos, New Mexico, and he captured specimens of each form 

 at San Pedro, but the ranges of the two species rarely overlap. 

 Specimens examined. — Total number, 96, as follows: 



Arizona: Agua Fria, 4;^ Aubrey Valley. 1; Clarks Valley, Mogollon Mountains, 

 2;^ Flagstaff, 7; Keams Canyon, 1; Kendrick Park, 4; Little Spring, 6; 

 Mormon Lake, 5; San Francisco Mountain, 7; Spaulding's Ranch, Agua 

 Fria Valley, 1;^ Springeiville, 13, Winslow, 2. 



Colorado: Bedrock, 2;- Cortez, 1;^ Coventry, l.^ 



New Mexico: Acoma, 1; Albuquerque, 7; Chusca Mountains, 2; Espanola, 2; 

 Fairview, 2; Fruitland, 1; Liberty, 1; Magdalena, 3; Manzano Mountains, 

 1; Ojo Caliente, 2; Pecos, 3; Rio Alamosa, 3; San Augustine Plain, 2; San 

 Mateo Mountains (Socorro County), 1; San Pedro, 1; San Rafael,!; Thoreau, 

 2; Wingate, 3; Zuni Mountains, 1. 



TABLES OF MEASUREMENTS. 



Adult male specimens of Cynomys. 







Skin. 



Skull. 







iqui 











o 







!>> 





Species and locality. 



useum hu: 



otal length 



ail vertebr 



ind foot. 



ondvlobas 

 length. 



y gomat 

 breadth. 



Mandible. 





axillar 

 tooth row, 



Condition of molar 

 teeth. 















N 











C. ludovicianus ludovicianus. 























Montana: 

























66690 



375 



72 



55 



59.1 



44.7 



45. 



5 



16.2 



Moderately worn. 



Do 



. 66691 



374 



85 



60 



59.0 



44. 4 



45. 



3 



15.9 



Do. 



Darnall's Ranch 



169447 



410 



95 



65 



62.5 



46.6 



47. 



7 



16.9 



Do. 



North Dakota: Medora 



161314 



405 



96 



64 



61.4 



45.5 



45. 



9 



16.9 



Much worn. 



South Dakota: 























Fort Pierre 



191426 



373 



76 



62 



61.0 



45.2 



45. 



8 



16.8 



Considerably worn. 



Buffalo Gap 



191428 



384 



90 



63 



60.8 



43.8 



46. 



4 



16.8 



Moderately worn. 



Do.... 



191429 



360 



84 



61 



59.5 



42.9 



45. 



0 



16.6 



Do. 



Wyoming: 

























169493 



396 



93 



64 



60.6 



45.2 



45. 



8 



17.0 



Do. 



Newcastle 



65894 



390 



79 



62 



60.9 



44.2 



46. 



7 



16.8 



Do. 



Nebraska: 























Kennedy 



191427 



392 



78 



57 



61.4 



44.8 



46. 



1 



16.8 



Do. 



Do." 



18678 



390 



92 



63 



59.2 



45.7 



44. 



8 



16.5 



Do. 



Alma 



110770 



409 



89 



65 



62. 1 



47.0 



48. 



1 



17.2 



Do. 



Colorado: 

























69521 



370 



82 



62 



60.2 



4.5.5 



46. 



0 



17.1 



Considerably worn. 



Olney 



69952 



379 



83 



61 



59.6 



44. 1 



45. 



5 



17.0 



Moderately worn. 



70020 



355 



82 



61 



57.2 



43. 1 



43. 



9 



16.9 



Do. 



Kansas: Pendennis 



87627 



371 



81 



62 



60.3 



47.2 



46. 



2 



16.9 



Considerably worn. 



Oklahoma: 





















Mount Scott 



132440 



375 



115 



63 



61.5 



44.2 



47. 



2 



17.3 



Moderately worn. 



Do 



132441 



376 



104 



63 



59.6 



44.8 



45. 



9 



17.0 



Do. 



Texas: 























Vernon 



64783 



365 



82 



61 



60.6 



44.4 



46. 



4 



16.8 



Considerably worn. 



Do 



64784 



413 



93 



60 



63.6 



48.1 



47. 



3 



16.6 



Do. 



Henrietta . - . 



64780 



386 



87 



66 



62.0 



45.3 



48. 



4 



17.0 



Moderately worn. 



1 Collection Amer. Mus. Nat. Hist. 2 Collection E. R. Warren. 



