MAMMALS OF THE MEXICAN BOUNDARY. 



307 



9, 1S9-1. They were subsequently taken in the Tule, Granite, and Gila 

 mountains. As we traveled north from Tinajas Altas, east of the 

 Gila Mountains, it was last noted on the plain midwa}' between Tinajas 

 Altas and Adonde, on the Gila River, and was not again seen until we 

 reached Gila City on the Gila River at the northern extremity of the 

 Gila Mountains. None were observed on the lower course of the 

 Colorado River. 



During- February, 1S94:, the rock-squirrel was found in al)und- 

 ance in the vicinity of Tinajas Altas, numbers having been attracted 

 to the locality from the surrounding country b}" the grain spilled 

 bv the draft animals of the Survey. A single trap, conspicuously 

 placed on a rock near my tent, kept me full}^ occupied with skinning 



Fig. 4S.— Am.mospermophilus harrisii saxicola. (Type, Cat. no. 59869, U.S.N.M.) a. Dorsal 

 view; 6, Ventral view; c, Lateral view. 



specimens of it which were caught. In the Granite Mountains its 

 capacious cheek-pouohes were usually distended with mesquite seeds. 

 Three females, taken February 16 to 19, 189-1, each contained 6 large 

 fetuses, showing that the 3'oung are born with some uniformity late 

 in February, as no young were seen up to that season. 



Measurcmetits of 58 specimens of the A7)imosper)iwp}tihis horrisii grotq). 



Museum num- 

 ber. 



Sex and 



Pt>o 



<i 12155 In 

 a22U : In 

 02235 In 

 2236 In 

 2237 I In 

 2238 j In 

 a2239 .-- 



skin., 

 skin., 

 skin., 

 skin., 

 skin . . 

 skin.. 



a 2240 

 2241 



93 

 91 

 107 

 125 

 129 

 130 

 150 



151 

 152 



Ammospermophilus harrisii. 



Fort Verde, Arizona 



do 



do 



.do . 

 .do , 

 .do. 



12 miles east of Peach Springs, 

 Mohave County, Arizona. 



do 



do 



1884. 

 Apr. 8 

 Apr. 15 

 June 26 

 Sept. 10 

 Sept. 19 

 ....do... 

 Nov. 20 



.do... 

 .do... 



d'ad. 

 cf ad. 

 ? juv. 

 cf ad. 

 cTad. 

 V juv. 

 9 ad. 



9 ad. 

 9 ad. 



vim. 

 251 

 235 

 190 

 243 

 217 



214 

 217 

 221 

 232 



mm. 

 86 

 80 

 67 

 80 

 70 



70 

 53 

 66 

 75 



mm. 

 36.4 

 35 



