Vol. XXVI, pp. 197-198 October 23, 1913 



PROCEEDINGS 



OF nil. 



BIOLOGICAL SOCIETY OF WASHINGTON 



TWO NEW MURINE RODENTS FROM BALTISTAN. 



BY GERRIT S. MILLER, JR. 



[By permission of the Secretary of the Smithsonian Institution.] 



Among the mammals which Dr. W. L. Abbott recently col- 

 lected in Baltistan and presented to the United States National 

 Museum are representatives of a vole and a rat belonging to 

 undescribed forms. 



Alticola glacialis sp. nov. 



Type.— Adult female (skin and skull) No. 176,071 U. S. National 

 Museum. Collected at Chogo Lungma Glacier (altitude 11,000 feet), 

 Baltistan, August 23, 1912. Original No. 7841. 



Diagnosis. — Like Alticola montosus* of central Kashmir, but tail not 

 so long (usually 34 to 44 instead of 45 to 55) and color noticeably iess 

 brown. 



Color. — Upperparts a moderately light gray with a faint brownish suf- 

 fusion along back. The individual hairs are slate-color through the 

 greater part of their length, then dull ivory-yellow (3 mm.), the tips 

 black. Underparts between pallid-mouse-gray and white, the contrast 

 with color of sides noticeable, but line of demarcation not sharply de- 

 fined. Feet grayish white. Tail grayish white below, the upper surface 

 brownish at tip, the dark area sometimes extending to base, but rarely 

 as well defined as in average specimens of A. montosus. 



Skull and teeth. — The skull and teeth resemble those of Alticola mon- 

 tosus. 



Measurements. — Type: head and body, 11(1; tail, 40; hind foot (dry), 

 20 (18.6) ; condylobasal length of skull, 27.0 (26.8) ; t zygomatic breadth, 

 14.8(15.0); interorbital constriction, 4.0 (4.0); occipital breadth, 12.8 

 I L2.8); occipital depth, 7.0 (7.0); nasal, 8.0 (7.8); diastema, 8.0 (8.0); 

 mandible, 17.2 (16.8); maxillary toothrow (alveoli), 6.6 (0.4); mandi- 

 bular toothrow (alveoli), 6.4 (6.2). 



* 1894. A rvicola montosa True. Proe. U. S. Nat. Mus., vol. 17, p. 11, May 8, 1894. (Cen- 

 tral Kashmir, altitude 11,000 feet.) 



1905. Microtus imitator Konhote, Ann. and Mag. Nat. Hist., ser. 8, vol. 15, p. 197, 

 February, 1905. (Tullian. Kashmir, altitude 11,000 feet.) 



+ Cranial measurements in parentheses are those of an adult female Alticola montosus 

 from Min Nai, Kashmir (No. 173,701). 



51— Proc. Biol. Soc. Wash., Vol. XXVI, 1913. (197) 



