290 MICROTINiE 



Characters. — Closely resembling E. m. mucronatus, but smaller. 

 Size rather small (hind-foot 17 mm. ; condylo-basal length of skull 

 24-9 mm., instead of 19 and 26 respectively, as in mucronatus). 



Colour dark and rich. Upper parts near " clove brown " of 

 Ridgway, brightened by dull golden or rufous hair-tips. Under 

 surface slaty grey. Feet above scarcely lighter than upper 

 surface of tail. 



Skull with small auditory buUse and large teeth as in E. in. 

 mucronatus ; distinguished from that of the latter by its smaller size 

 and narrower braincase. Cheek-teeth as in E. m. melanogaster ; 

 m^ with only three outer and three inner salient angles. 



For external and cranial measurements, see tables at end of 

 olume. 



2. Eothenomys fldelis Hinton. 



1923. Eothenomys fidelis Hinton, Ann. Mag. N.H., [9], 11, p. 150; 

 Thomas, t.c, p. 661. 



1924. Microtus {Eothe^iomys) fidelis G. M. Allen, Amer. Mus. Nov., 

 133, p. 4. 



Ti/pe.— B.M., No. 22.12.1.8; adult female, collected Nov. 

 1921, by Mr. G. Forrest, and presented by Colonel Stephenson 

 R. Clarke, C.B., D.S.O. 



Type locality. — Li-chiang Range, N.W. Yunnan ; in latitude 

 27° 30' N., at altitudes between 13,000 and 14,000 feet. 



Range. — The flanks of the Li-chiang Mountains and other parts 

 of Yunnan. (See remarks quoted from G. M. Allen below.) 



Characters. — A bright-co-loured species, differing from E. melano- 

 gaster chiefly by its larger size and long narrow skull. Size large 

 (hind-foot about 20 mm. ; condylo-basal length of skull to about 

 28 mm.). Essential external characters as in E. melanogaster. 



Colour nearly as in the brighter subspecies of E. melanogaster 

 (e.g., colurnus and miletus). Upper parts dark brown (near 

 "mummy brown"), brightened by rufous hair-tips; under 

 surface slate grey, with a hoary tinge. Feet and tail dusky above. 



Skull very large, long and narrow ; with the temporal ridges 

 and post-orbital squamosal crests strongly developed. Auditory 

 bullae relatively small, teeth relatively large, their relations about 

 as in E. m. libonotus and E. m. miletus. Cheek-teeth (Fig. 86a 

 and b, 2) normal ; m^ with four, m^ with three inner salient 

 angles ; m^ with three outer and four inner salient angles. 



For external and cranial measurements, see tables at end of 

 volume. 



Remarks. — This is the largest known member of the genus, 

 a very reddish-looking vole with large skull and hind-foot. 

 Allen states that " a fine series was secured from the same area 

 [Li-chiang Mountains] by the Second Asiatic Expedition [American 

 Museum], as well as others from Chunglu, Siao-ke-la, Chiangwei, 

 and Yangtsien, on the Mekong River between altitudes of 6000- 



