ART. 1 MAMMALS FROM CHINA — HOWELL. 51 



Genus CLETHRIONOMYS Tilesius 



CLETHRIONOMTS RUFOCANUS KEGULUS (Thomas) 



Craseomys regulus Thomas, Proc. Zool. Soc. London, 1906, p. 863 (Mingyong, 

 Seoul, Korea). 



Specimens. — Fifty-four: Sunijari River, 23, and Imienpo, Man- 

 churia, 23 ; 150 miles up the Yalii River, 6, and Potaidon, Korea, 2. 



There is more individual than geographic variation in the skulls 

 of these specimens. Those from the Yalu River are paler than the 

 Imienpo examples, but this difference may be seasonal. 



CLETHRIONOMYS RUFOCANUS SHANSEIUS (Thomas) 



Craseomys shanscius Thomas, Proc. Zool. Soc. London, 1908, p. 643 (100 

 miles northwest of Taiyuanfu, Shaiisi, (jhina). 



Spechnens. — Thirteen from Shansi : 50 miles northwest of Taiy- 

 uanfu, 5, and 90 miles west of the same place, 6 ; 30 miles- west of 

 Kueihuacheng, 2. 



Sowerby found these red-backed mice most commonly in the 

 vicinity of mossy banks in forests. 



Genus MICROTUS Schrank 



MICROTUS (CARYOMYS) INEZ INEZ Thomas 



Microtus (Eothenomys) Inez Thomas, Abst. Proc. Zool. Soc. London, 1908, 

 p. 45 (Kolanchow, Shansi, China). 



/Specimen. — One from Yenanfu, Shensi. 



MICROTUS (CARYOMYS) INEZ NUX Thomas 



Microtus {Eothenomys) nux Thomas, Abst. Proc. Zool. Soc. London, 1910, 

 p. 26 (Shangchow, Shensi, China). 



SpecimeTis. — ^Three from Shangchow, Shensi. 



This is a darker, less brown animal than inez typicus and the 

 relationship of the two is undoubtedly subspecific. Hinton (1926) 

 in his monograph of the voles placed both inez and nux in the 

 synonymy of Evot&m.ys rufocanus shanseius and stated that both of 

 these forms as well as other Caryomys were based upon immature 

 specimens of the local subspecies of Evotomys rufocamas. The three 

 examples listed above were a part of the original series upon which 

 Thomas based his description of ivax.^ and they are conclusively 

 different from the Evotomys, or as now termed, Glethrionomys, of 

 this locality, of any age whatsoever, both the skins and the skulls 

 departing from the latter in a number of important respects, 



MICROTUS (EOTHENOMYS) MELANOGASTER MELANOGASTER (Milne-Edwards) 



Arvicola melanogaster Milne-Edwabds, Nout. Arch. Mus., vol. 7, 1871, p. 

 93 (Muping, Szechwan, China). 



