On Voles from the '/Win S/iun Rt'-jion. I»7l 



A 3liii[;lc specimen from Flat Island, Mokoliliiaii OiiMii), 

 N.\\''. of Great IJarrier Islainl, also rcc(!ivcJ from Mr. iSutor. 

 Allied to L. (I'tieuni, (Jiiard. 



KXri-ANATIUN UV I'l.ATE X. 



Fir/. 1. Li/ffommn Stiteri. 



J'if/. 2. Lyi/osonin /tonnilonofinn, 



Fiy. '2(1. I)itto, side view of lioud, 



Nrtturnl size. 



XL\'III. — Some Voles from the Tinn Shan Re<jio/i. 

 By Gerrit S. Milli:i{_, Jr. 



Two small collections of voles from the Tian Slian l\rountaiiis 

 liave recently been referred to nie for determination by 

 Mr. OldticKl Thomas. The fii'st was made during August 

 and September, 1904, by Mr. A. B. Bayley Worthington, 

 while on a shooting-trip to the Altai Mountains, in the Tekes 

 Valley, Southern Hi, in the Koksu Valley, Kucha, and in the 

 intervening mountains of the Tian Shan chain. The speci- 

 mens were presented to the British Museum. The second, 

 containing ten skins, was made by Mr. A. A. Kutsenko, of 

 Przewalsk (Karakol), in the region immediately west of that 

 traversed by Mr. Worthington. I find that the two collec- 

 tions include the four following species, one of which, an 

 Erotomi/Sj is of special interest as the first member of its 

 genus to be detected in Central Asia. 



Microtus ti'anscham'cus. Biichner. 



An adult male (collector's number 20) was taken by 

 Mr. Worthington in " open veldt near stream " in the Koksu 

 Valley, at 10,000 feot altitude, September 16, 1904. The 

 Sj)ecimen agrees in all essential characters with Biichner'.s 

 description based on material from the Juldus Valley at the 

 same altitude. Its measurements are, however, somewhat 

 less, and the skull ap[)ear3 to be smaller than the specimen 

 figured. 



Head and body 88 mm.; tail- vertebrae 21; hind foot 

 lG-0 (14) ; car 10. 



Skull: upper length 22'4 ; condylo-basal length 228; 

 palatal length 12G ; diastema 6 8; zygomatic breadth 10 2; 

 inlerorbital constriction 2*8 ; breadth of brain-case above 

 roots of zygomata 11; mandible 14; maxillary tooth-row 

 (alveoli) 5'4 ; mandibular tooth-row (alveoli) 5. 



26* 



