I 93-] Allen, Mammals from New Mexico and Durango. 595 



Measurements. Type, total length, 238; tail vertebras, 98; hind 

 foot (without claws), 32; ear from notch, 19. Nine adult topotypes 

 (5 males and 4 females) measure as follows: Total length, 234 (222- 

 241); head and body, 137.6 (127-140); tail vertebras, 97.2 (95-102); 

 hind foot, 32.1 (32-33); ear, 19.9 (19-22). 



Skull: type, total length, 39; greatest zygomatic breadth, 21. 

 Nine topotypes: Total length, 38.8 (37-40); zygomatic breadth, 20.7 

 (20-21). Six skulls of E. bulleri measure: Total length, 37.5 (37-38.2) ; 

 zygomatic breadth, 20.1 (20-20.5). (No external measurements of E. 

 bulleri are available for comparison, the collector omitting to take 

 measurements before skinning.) 



Eutamias durangcz is based on a series of 13 specimens, all 

 adult except two, taken by Mr. Batty at Arroyo de Bucy, in 

 the Sierra del Candella, at an altitude of about 7500 feet, May 

 22-30. As already noted above, it resembles E. bulleri, but is 

 considerably larger, and quite different in coloration, being 

 much lighter colored, with the gray areas faintly suffused with 

 pale buff, and the median white dorsal stripes with a wash of 

 pale cinnamon. 



Mr. Batty informs me that this chipmunk is reported to 

 range for some distance to the southward along the eastern 

 base of the Sierra Madre. 



4. Citellus (Otospermophilus) grammurus rupestris, 

 subsp. nov. 



Type, No. 21231, ? ad., Rio Sestin, northwestern Durango, Mexico, 

 April 13, 1903; J. H. Batty. 



Front, top, and sides of head and the nape black, a few of the hairs 

 with gray or brownish gray tips, more numerous toward the edges of 

 the black area which is not sharply defined; nose as far back as the 

 eyes and cheeks grayish brown, the hairs being blackish brown at base 

 and broadly tipped with whitish ; a patch of whitish above and below 

 the eyes, giving the effect of broad white eyelids; whole upper surface 

 of body varied or ringed with blackish brown and whitish, darkest on 

 the anterior half and lightest on the posterior half of the dorsal region, 

 more or less (often strongly) suffused with yellowish brown; sides 

 lighter and grayer than the median area; underfur black or blackish, 

 and the coarser hairs black basally and at the extreme tip, with a sub- 

 apical broad band of white or whitish; throat, prepectoral, and axial 

 regions ochraceous buff; rest of ventral surface paler or yellowish buff, 

 the hairs dusky at the extreme base; fore feet yellowish gray; hind 



