ANTELIOMYS 297 



brown," with a slight reddish tinge produced by the brighter 

 hair-tips ; under parts bluish-grey, rather heavily washed on 

 chest and belly with wood brown. Ears large and prominent, 

 coloured like the back. Tail very long, about two-thirds the length 

 of the head and body ; indistinctly bicoloured, dark brown or 

 blackish above, greyish-white below. Hands and feet dusky. 



Skull with relatively large and lofty braincase, its upper 

 surface well arched. Auditory bulla) large, the basioccipital 

 correspondingly narrow in front. 



Geographical differentiation. — Two subspecies distinguished 

 by slight average differences in the form of the m^ have been 

 described by Thomas. 



la. Anteliomys chinensis chinensis Thomas. 



1891. Microtus chinfnsis Thomas, Ann. Mag. N.H., [6], 8, p. 117. 

 1896. Microlii.^: (Anteliomys) chinensis MUler, N. Araer. Fauna, No. 12, 

 p. 48; Thomas, P.Z.S., 1911, p. 175. 



Type.— B.M., No. 91.5.11.3; adult female. 



Type locality. — Kia-ting-fu, Western Sze-chwan, China. 



Range. — Western Sze-chwan. Known from the type locality, 

 and from Omi-San. 



Characters. — External and cranial characters as described 

 above under the species. Cheek-teeth as usual in the genus ; 

 m^ normally with five salient angles on the inner side ; dentinal 

 spaces of upper teeth relatively confluent (for details see account 

 oi A. c. tarquinius below, and Fig. 88). 



For external and cranial measurements, see tables at end of 

 volume. 



lb. Anteliomys chinensis tarquinius Thomas. 



1911. Microtus {Anteliomys) chinensis Thomas, P.Z.S., 1911, p. 175 

 (in part). 



1912. Microtus [Anteliomys) chinensis tarquinius Thomas, Ann. Mag. 

 N.H., [8], 9, p. 517. 



Type.—B.^., No. 11.2.1.207; adult male, collected June 15, 

 1910, by M. P. Anderson, and presented by the Duke of Bedford. 



Type locality. — 23 miles S.E. of Ta-tsien-lu, Western Sze- 

 chwan. Altitude 10,000 feet. 



Range. — Known only from the neighbourhood of the type 

 locality. 



Characters. — External and cranial characters as in the typical 

 form. 



Cheek-teeth somewhat more specialized, the dentinal spaces of 

 upper molars more tightly closed and m^ somewhat reduced ; 

 usually with only four salient angles on its inner side (in 7 out of 8 

 specimens ; a fifth inner angle present in 8 out of 9 specimens of 

 A. c. chinensis). With regard to the greater confluency of the 

 dentinal spaces, Thomas records that the triangles of the first 

 V.L. X 



