1905. } MAMMALS OF CHINA. 391 
is greater than that of MW. griseipectus. The ears are longer, and. 
the colour of the under parts, which is white, differs from that of 
both I, jlavipectus and MW. griseipectus by the fact that the hairs 
are white to their bases and not slate-coloured. 
When working out Pére David’s collection from Moupin, 
M. Milne-Edwards described a species under the name of 
M. owangthome, stating that it was distinguished by a pure white 
cross on the breast. It was described from a single specimen, 
which, by the kindness of Dr. Oustalet, I had the privilege of 
examining when in Paris, and I am of opinion that it is merely 
a 4-grown example of this species. 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 otherwise typical 
Jlavipectus. 
Another species from the collection of Pére David was described 
by M. Milne-Edwards under the name J, plumbeus, and figured 
in the Rech. 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. plumbeus, but on examination of the skull it proves to be a 
very young individual, probably belonging to I. flavipectus. 
The latter is the only specimen I have seen that shows white 
incisors, a characteristic of IZ. plumbeus. Under these circum- 
stances, and as the skull of the type of JZ. plumbeus cannot be 
examined, as it has not been removed from the skin, we must, in 
the absence of further evidence, consider pluwmbeus as founded on 
an immature flavipectus. 
MUS LOSEA Swinhoe. 
Mus flavescens E\liot, Swinhoe, P. Z. 8. 1864, p. 186. 
Mus rufescens Gray, Swinhoe, P.Z.S. 1870, p. 636. 
Mus losea Swinhoe, P. Z. 8. 1870, p- 637. 
This species may best be described as a small formi of J/. flavi- 
pectus, to which it closely approaches in coloration. The under 
parts are, however, as a rule greyer. The tail is unicoloured and 
very finely annulated (the ammuli being 14 to the em. as against 
12 in flavipectws), and covered with minute and almost invisible 
sete. 
The ear is elongated, being longer by 2 mm. than HELGA 
avipectus of the same size. 
The skull, except in being + the size, is otherwise ble 
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 
PA2 zygomatic readlth 15; interorbital breadth 5; length of 
molar series 6°5; breadth of brain-case 14. 
Proc. Zoot. Sno 100, Wott, Je INO, ZO WUE = 27 
