52 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 75 



Specimen. — One from just south of Mount Omei, Szechwan. 

 The skull of this single specimen is closer to the typical race than 

 to mucronatus. 



MICROTUS (EOTHENOMYS) MELANOGASTER COLURNUS Thomas 



Microtus {Eothenomys) melanogaster colurnus Thomas, Ann. Mag. Nat. Hist., 

 ser. 8, vol. 7, 1911, p. 209 (Kuatun, Fukien, China). 



Specimens. — Seven from the type locality. 



One of these topotypes has four inner salient angles to m^, but is 

 otherwise indistinguishable from the rest. 



MICROTUS (ANTELIOMYS) CHINENSIS Thomas 



Microtus chinensis Thomas, Ann. Mag. Nat. Hist., ser. 6, vol. 8, 1891, p. 117 

 (Kiatiugfu, Szechwan, China). 



SpectTnens. — Five from Washan, Szechwan. 



A late October specimen has a striking golden overtone to the 

 dorsum, caused by minute golden tips to the longer hairs. The re- 

 mainder were taken during July and are in ragged pelage, somewhat 

 darker. 



MICROTUS (PHAIOMYS) MANDARINUS MANDARINUS (Milne-Edwards) 



Arvicola mandannus Milne-Edwaeds, Rech. Mnmm., 1871, p. 129 (probably 

 near Saratsi, Shansi, China (see G. M. Allen, 1924)). 



Specimens. — Three, from 5 miles south and 50 mijes northwest of 

 Taiyuanfu, Shansi. 



Sowerby found these voles inhabiting grassy hillsides. 



MICROTUS (PHAIOMYS) MANDARINUS JOHANNES Thomas 



Microtus Johannes Thomas, Abst. Proc. Zool. Soc. London, 1910, p. 25 (12 

 miles northwest of Kolanchow, Shansi). 



Specimens. — Five from Wutsai, 20 miles west of Ningwufu, Shansi. 



These specimens were compared by Mr. Miller with the type in the 

 British Museum. Sowerby found this race to be an inhabitant of 

 open fields. In his notes he mentioned that the range of mountains 

 lying between Ningwufu and Taiyuanfu evidently constitute a bar- 

 rier which separates the ranges of true miandannus from the paler 

 race of the Ordos type of desert country to the northwest, just as this 

 range marks the southern boundary in this region of the distribution 

 of Phodopus and Dipus. 



MICROTUS (PHAIOMYS) PULLUS Miller 



Microtus pullus Miller, Proc. Biol. Soc. Wash., vol. 24, 1911, p. 53 (Chlao- 

 cheugshau, 90 miles west of Taiyuanfu, Shensi, China). 



Specimens. — Three (including the type) from the type locality. 



It is probable that this raiinial is but a darker subspecies of ma?i- 



daH7ius, but the material available is not adequate to establish this 



