MAMMALS FUOM WESTERN ClilXA. 169 



pn.lfita.l length 11 ; front of canine to back of molar 8 ; ji'' on outer 

 edge 2-9. 



A male specimen measure-; : liead and body 138 mm. ; tail 54 ; 

 bind foot 24; carnassial tootb 3-1. 



Hah. as above. 



Type. Adult female. B.M. No. 11.2.1.86. Original number 

 2388. Collected 1 July, 1910. 



This most beautiful little Weasel competes with the American 

 M. rixosa Bangs for the honour of being the smallest existing 

 Ca.rnivore, and is readily distinguishable from any Old World 

 Mitstela by its small size alone. Its essential coloration is very 

 much as in the much larger M. kathiah, of which a local luce 

 (dorsalis) has been recorded from this region. But the hind foot 

 of that animal measures 30 mm., so that it is evidently quite a 

 distinct species. 



The combination Mastela hedfordi being already in use, I have 

 given to this striking new species a designation ba.sed on the 

 family name of the donor of the present magnificent accession to 

 the National Collection of Mammalia. 



20. Tamiops swinhoei M.-Edw. i 

 d'. 2510. Omi-san, Sze-chwan. 9500'. 



21. Sciurotamias davidianus M.-Edw, 



5 . 2277. 40 miles N. of Kai-chow, S. Kan-su. 



22. Sciurotamias davidianus ooxsobrixus M.-Edw. 



J . 2320, 2321. $ . 2316. 23 miles S.E. of Ta-tsien-lu. 7500'. 

 6. 2456. Omi-san. 6000'. 



The Ta-tsien-lu specimens are not very typical consobrinus, but 

 are none of them adult. 



23. Marmota robusta M.-Edw. 



5 . 2270. Old Tau-chow, Kan-su. 9000'. 

 ?. 2269. Near Tau-chow. 10,000'. 



24. Mus GANSUEXsis Sat. 



6 . 2220, 2221, 2222. 10 milts S. of Tau-chow, Kan-su. 

 Described as a Leggada by Satunin. 



25. Epimys coxfuciaxus luticolor Thos. 



c^. 2196, 2197, 2199,2200. §. 2198. Near Si-Ho-Hsien, 

 S. Kan-su. 5000'. 



c? . 2206, 2219. 60 miles S.E. of Min-chow, Kan-su. 8000'. 



6. 2280, 2286, 2287, 2294, 2295, 2301, 2302. 2309, 2311. 

 $. 2281, 2282, 2288, 2310, 2312. Wen-hsien ' Country, S. 



Kan-su. 



These Kan-su specimens tend to be, as is right, intermediate 



