EOTHENOMYS 291 



9000 feet ; Ha-pa (north of Taku) 10,000 feet ; Yang-pi River 

 (Tengyneh Road) at 5000 feet ; Tali Lake, 6500 feet ; and other 

 localities. The entire series is very uniform in its characters. 

 In two cases, three embryos were found in specimens captured 

 the first week in October, and two in a female taken October 30, 

 1916. These are not only late litters but, as in the case of the 

 preceding species [i.e., E. melanogaster], indicate a correlation 

 between the small number of young per litter and the reduced 

 number (four) of mammse. It is possible also that the breeding 

 season extends over a longer period than in some other Microtines." 



3. Eothenomys proditor Hinton. 



1923. Eothenomys proditor Hinton, Ann. Mag. N.H. [9], 11, p. 152; 

 Thomas, t.c, p. 661. 



1924. Microtus {Eothenomys) proditor G. M. Allen, Amer. Mus. Nov., 

 133, p. 4. 



Type.—^M., No. 22.12.1.10; adult male, collected by Mr. 

 G. Forrest, May 27, 1921, and presented by Colonel Stephenson 

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



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

 27° 30' N. Altitude 13,000 feet. 



Range. — Known only from the Li-chiang Mountains between 

 9000 and 13,000 feet. 



Characters. — A bright-coloured, short-tailed, medium-sized 

 species, with highly modified cheek-teeth. Size medium (hind- 

 foot 16-18 mm.; condylo-basal length of skull to 27-3 mm.). 

 Tail short, usually between 28 and 38 mm. Soles with six pads ; 

 hairy from heel to pads. Mammse — 2^4. 



Colour of upper parts dark brown, but noticeably brighter than 

 in E. fidelis ; belly usually with well-marked yellowish suffusion. 

 Feet dark above, concolorous with the upper surface of the tail. 

 Tail dusky above, paler below. 



Skull normal, rather smaller than that of E. fidelis ; auditory 

 bullae rather large, teeth rather light. Cheek-teeth (Fig. 86ffl and 

 h, 5) much reduced in pattern ; m^ with three inner salient angles 

 only ; m^ with only a very slight vestige of the third inner angle 

 (cusp «) ; m^ with the first outer infold shallow, as in AUicola and 

 some other voles, and with vestigial fourth outer and fourth inner 

 salient angles. Lower cheek-teeth normal ; the outer angles of 

 wig well developed. 



For external and cranial measurements, see tables at end of 

 volume. 



Remarks. — This species is very sharply distinguished from 

 E. fidelis, which also inhabits the Li-chiang Range, by its smaller 

 general size, shorter tail, and especially by its peculiar teeth. The 

 latter in character approach those of Anteliomys and AUicola. 

 It is noteworthy that no member of the genus Neodon is known 

 to accompany E. fidelis and E. proditor upon the Li-chiang 



