MAMMALS OF THE MEXICAN BOUNDARY. 



325 



head grayish, mixed with yellowish brown. The tail which is less 

 bushy and shorter than in O. gramirviirus, is yellowish gray, the lateral 

 hairs thrice annulated with black. Feet yellowish gray. Under sur- 

 faceof body grayish white. The interscapular region is often blackish, 

 more or less vermiculated with pale annuli. Length, 410 mm.; tail 

 vertebrae, L70; hind foot, 55; ear above crown. 21; ear above notch, 

 27; length of head, 62. Skull, .~>7 by ">4 mm. 



Remarks. Seventy-one specimens were collected from May 1<> to 

 July 13, 1894. The greater portion of these had acquired the summer 

 pelage at the time of capture, though many had not finished the molt. 

 It was observed that those living on the high mountains were latest in 

 molting. Youno- were being born during the whole of this period. 

 In coloration they closely resemble their parents at the same season. 

 The stripe on the shoulders of this species is an interesting indication 

 of its relationship to the striped ground-squirrels. Some of the speci- 

 mens, taken near the last monument, had a strong odor resembling 

 vanilla, from digesting vegetable food. 



Recortf and measurements of SI specimen* <;/' OtospermophUus beecheyi. 



•j Mamm;e 6 pairs. 



'' \ in. i ir.m Museum of Natural History. 



■ Head and body, '-'•">•"> mm. 



