302 



BULLETIN 56, UNITED STATES NATIONAL MUSEUM. 



tered until we had crossed the Western Desert and readied the rocky 

 Itase of the Coast Range Mountains in California. 



Habits. In the vicinity of El Paso these ground-squirrels were 

 abundant, living among rocks and cliffs on both sides of the Rio 

 Grande, in Texas and Chihuahua. They were readily taken in traps 

 baited with cheese. 



Measurements of S3 specimens of the AmmospermophUus leucurus group. 



Museum num- 

 ber. 



60828 



61153 

 60829 

 60832 



(11157 

 61162 

 61163 

 61164 

 611G5 

 61166 



61167 



60830 



"N-7:; 



a8274 

 60834 

 « 8275 

 n8279 



60839 

 60840 

 o828] 

 •< 8282 



20069 



20078 

 20070 



■Jill it ,7 

 20068 

 21 1117 1 

 20072 



20117:. 

 20077 



-111171, 



In skin. 



61153 

 60829 



(illS 12 



61157 

 61162 

 61163 

 61164 

 61165 

 61166 



01 107 

 63089 

 60830 



0012 



6613 

 60834 



COM 

 00 is 



01 in;; 1 

 60840 



37030 

 3703'J 

 ;;:>iii 

 35442' 

 354 13 

 35445 

 35446 

 35478 

 S54 19 

 35482 



Locality. 



1956 



1900 

 1965 



1907 

 197:; 



1974 

 1970 

 1977 

 3564 



3580 

 3585 

 1207 



121 1 



1233 

 1234 



1235 

 1288 



1297 

 1321 

 1325 

 1334 



1125 

 1431 

 1 173 

 1-174 

 1 487 

 1488 



1501 

 1524 

 1531 

 1532 



AmmospermophUus It neurit*. 



Grand Canyon of the Colorado, 

 near Pine Springs, Arizona, 



First water, at east base of 

 Coast Range Mountains, near 

 Mexican Boundary Line. 



do 



do 



Mountain Spring, San Diego 

 ( lounty, California. 



do 



do 



Date. 



.do 

 .do. 



Jacumba, San Diego county, 

 California. 



....do 



....do 



1884. 



Nov. 10 



1894. 



May 7 



May 8 

 May 9 

 May 12 



May 1:1 

 May 11 



...do... 



Firsl water, at east base of 

 ( 'oast Range Mountains, near 

 Mexican Boundary Line. 



Mountain Spring, f-'an Diego 

 County, « 'alil'ornia. 



.do 



.do 



Jacumba San Diego County, 

 California. 



do ' 



do 



do 



do 



AmmospermophUus leucurus in- 



It 1 jilts. 



El Paso, Te\as , 



....do 



....do 



....do 



.do. 

 .do. 



.do. 



.do. 

 .do 



May 15 

 May 10 

 May 22 



May 21 

 ....do ... 

 May 8 



May 9 



May 13 



...do.... 

 ...do .... 

 May 19 



May 20 

 May 2;; 

 May 21 

 ...do.... 



1892. 



Feb. 8 

 Feb 11 

 Feb. 19 



Fel). 20 



Feb. 21 



...do... 



Feh. 2:; 



Fel.. 27 



Mar. 2 



Mar. 3 



, a, I. 



5 ad. 



■'<, ad 



'', 



V ad. 



-' , ad. 

 ' ad. 



V ad. 

 'ad. 



' ad. 

 'ad. 

 ' ad. 

 ; ad. 

 ' ad. 

 f ad. 

 5 ad. 

 'ad. 

 cfad. 

 ' a.l. 



200 

 200 

 213 



mm. 

 51 



05 



58 

 70 

 75 



70 

 42 

 72 

 71 

 o50 

 73 



205 (.9 



22.S 09 



220 75 



232 73 



mm. 

 30 



37 

 38.5 



40 



39 



39 



39 

 39 



38 



10 



36 

 38 



38 .. 



30 



38 



37 

 39 

 39 



•. American Museum of Natural History. 

 '■ End of tail gone. 



■- Tail abnormal. 

 >' Mammae five pairs. 



. Head and body, 153 mm. 



