1905.] MAMMALS OF CHINA. 391 



is greater than that of M. griseipectus. The ears are longer, and 

 the colour of the under joarts, which is white, differs from that of 

 both M. Jlavi])ectus and AI. griseijyectus by the fact that the hairs 

 are white to their bases and not slate-colonred. 



When working out Pere David's collection from Moupin, 

 M. Milne-Edwards desci-ibed a species under the name of 

 M. ouangthomce, stating that it was distinguished by a pure white 

 cross on the breast. It was described from a single specimen, 

 which, by the Idndness of Dr. Oustalet, I had the privilege of 

 examining when in Paris, and I am of opinion that it is merely 

 a |-grown example of this sjjecies. The white cross is not so 

 conspicuous as one would be led to infer from the description, 

 and is merely a well-marked development of the white breast- 

 mark which is found in many individuals of othei-wise typical 

 flavipectus. 



Another species from the collection of Pere David was described 

 by M. Milne-Edwards under the name M. 2)lumheus, and figured 

 in the Recli. Mamm. This specimen I have also had an oppor- 

 tunity of examining, and the coloration depicted in the plate is 

 much too blue. There is a specimen in the British Museum 

 which agrees tolerably well with the description and type of 

 M. plumheiiSj but on examination of the skull it proves to be a 

 very young individual, probably belonging to M.flavipecUts. 



The latter is the only specimen I have seen that shows white 

 incisors, a characteristic of M. j^^umheus. Undei' these circum- 

 stances, and as the skull of the type of M. plumbeus cannot be 

 examined, as it has not been removed from the skin, we must, in 

 the absence of further evidence, consider 2}hf''>nbeus as founded on 

 an immature JJavijjectus. 



Mus LOSEA Swinhoe. 



Mits flavescens Elliot, Swinhoe, P. Z. S. 1864, p. 186. 



Mt(,s rufescens Grav, Swinhoe, P. Z. S. 1870, p. 636. 



Mtts losea Swinhoe, P. Z. S. 1870, p. 637. 



This species may best be described as a small form of M.flavi- 

 ptectus^ to M'hich it closely approaches in coloration. The under 

 parts are, however, as a rule greyer. The tail is unicoloured and 

 very finely annulated (the annuli being 14 to the cm. as against 

 12 in flavipectus), and covered with minute and almost invisible 

 setse. 



The ear is elongated, being longei' by 2 mm. than immature 

 Jlavijyectus of the same size. 



The skull, except in being 4 the size, is otherwise indis- 

 tinguishable. 



Dimensions (from skin). Head and body 150 mm.; tail 123 ; 

 ear 18; hind foot 26. 



Skull. Greatest length 32 mm. ; basilar length 26 ; palatilar 

 length 15; diastema 8; incisive foramina 6"5 ; length of nasals 

 1 2 ; zygomatic bi-eadth 1 5 ; interorbital breadth 5 ; length , of 

 molar series 6*5 ; breadth of bi-ain-case 14. 



Proc. Zool. Soc. 1905, Vol. II. No. XXYII. 27 



