Vol. XXV, pp. 59-60 April 13, 1912 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



TWO NEW MURINE RODENTS FROM TURKESTAN. 



BY GERRIT S. MILLER, JR. 

 [Published here by permission of the Secretary of the Smithsonia n Institution.] 



Of the two new Asiatic rodents here described one has been 

 represented in the collection of the United States National 

 Museum for several years, the other was recently sent for 

 determination by Mr. Oldfield Thomas. 



Alticola phasma sp. nov. 



Type. — Adult male (skin and skull) in British Museum. Collected on 

 eastern side of Kara Korum Mts., Chinese Turkestan, at altitude of be- 

 tween 9000 and 10,000 feet., October 13, 1911, by D. Carruthers. Original 

 number, )'>:!:'>. 



Diagnosis. — Externally like Alticola albicauda (True), but color more 

 pallid, not appreciably dilierent from that of A. acrophilus. Skull differ- 

 ing from that of A. albicauda in greater size of auditory bullae and 

 shorter diastema. Teeth as in A. albicauda (for figure see Proc. Acad. 

 Nat. Sci. Philadelphia, 1899, ]>. 294) except that crown of m 3 is notice- 

 ably longer than that of m z , and the third reentrant angle on outer side of 

 same tooth is usually so well developed as to subtend an evident fourth 

 salient angle. 



Measurements. — External measurements of type and of a second adult 

 male (No. 174,096 U. S. National Museum): head and body, 101 and 

 101; tail, 40.5 and 38; hind foot, 20 and 19.5; ear, 16 and 10; condylo- 

 basal length of skull, 27.0 and 26. K; zygomatic breadth, 14.8 and 15.0; 

 interorbital constriction, 4.0 and 4.0; occipital breadth] 12.6 and 12.4: 

 occipital depth, 7.0 ami 7.0; nasal, S.O and 8.0; diastema, 8.2 and S.2; 

 mandible, 17.2 ami 17.4; maxillary toothrow, 6.4 and 6.2; mandibular 

 toothrow, 6.2 and 0.0. 



Specimens examim d. — Five, all from the type locality. 



Remarks. — In this animal the pallid color of Alticola acrophilus is com- 

 bined with an extreme form of the complicated enamel pattern of 

 A. albicauda, to which peculiarities are added the large auditory bulla', 

 ami the long crown of ni\ neither of which is found in the related species. 



11— Proc. Biol. Soc. Wash., Vol.. XXV, 1912. (m 



