54 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 75 



MICROTUS PELLICEUS Thomas 



Microtus pelliceus Thomas, Ann. Mag. Nat. Hist., ser. 8, vol. 7, 1911, p. 383 

 (Ussuri River, Siberia). 



/Specimens. — Twenty-nine from the Simgari River, 60 miles south- 

 west of Kirin, Manchuria. 



In this species the incisors are much longer and project farther 

 than in M. coLamor-u/m. 



Family RHIZOMYIDAE 

 Genus RHIZOMYS Gray 



RHIZOMYS DAVmi Thomas 



Rhizomps damdl Thomas, Abst. Proe. Zool. Soc. London. No. 90, 1911, p. 5 

 (Kuatun, Fukien, China). 



/Specimens. — Three from Yenpingfu, Fukien. 



The skulls of the two largest individuals show some differences and 

 it is by no means impossible that the largest and smallest specimens 

 may ultimately prove to be sinensis, but in the absence of undoubted 

 representatives of the latter race, and in view of the fact that they 

 are all from the same place, it is certainly wiser to refer these speci- 

 mens to davidi. 



RHIZOMYS VESTITUS Milne-Edwards 



Rhizomijs vestitus Mh^ne-Edwards, Nouv. Arch. Mus., 1871, p. 93 (Muping, 

 Szechwan, China). 



Specitnens. — Five from Szechwan : Wenchwan, 3, and Wanhsien, 2. 



The condylobasilar measurement of some of these skulls is larger 

 (74 mm.) than that given by the describer for vestitus, but the re- 

 semblance seems to be with this form rather than R. timrdi. 



Family SPALACIDAE 



Genus MYOSPALAX Laxmann 



The four forms of this genus at hand are certainly not all distinct 

 species, but the binomial should be used for them until a better 

 understanding of the Asiatic molerats has been gained. 



MYOSPALAX CANSUS (Lyon) 



Mijotalpai cansus Lyon, Smiths. Misc. Coll., vol. 50, 1907, p. 134 (Taochow, 

 Kansu, China). 



Specimens. — Twenty-one : Yenanf u, 1 and Yulinf u, Shensi, 5 ; and 

 the following from Kansu; 15 miles southeast of Choni, 1; 15 miles 

 northeast of Chengning, 8; Taochow, 1 (the type) ; 30 miles south of 

 Lanchow, 4 ; and near Archuen, Minshan Mountains, 1. 



