MAMMALIA. 
43 
these characters our present animal agrees, as it does also in size and in the relative 
proportions of the tail and tarsus, circumstances which induce me to believe they 
are identical. 
In M. bimaculatus and M. gracilipes there are six naked tubercles on the 
under side of the tarsus, and the carpal pad is also naked. In having, however, the 
tarsus hairy beneath,* in dentition and in colouring, they agree so closely with 
M. elegans that I think they cannot be separated generically. 
MUS BIMACULATUS. 
Plate XII. 
Mus bimaculatus, Waterh., Proceedings of the Zoological Society of London for February 1837, p. 18. 
M. vellere pallide ochraceo, pilis nigricantibus adsperso, his ad latera rarioribus ; rostri 
lateribus, nota magna pone aurem utramque, artubus, corporeque subtus niveis ; 
auribus mediocribus ; caudd, quoad longitudinem, corpus fere cequante ; tarsis ad 
calc cm pilis argenteo-canclidis obsitis. 
Description. — Upper parts of the body of a very pale ochre colour, the longer 
hairs, however, are black, and at the apex grayish, and where they are 
numerous, as on the back and upper surface of the head, they give greater 
depth to the colouring ; the cheeks and sides of the body are of an almost 
uniform pale, but bright yellow ; the sides of the muzzle, the lower half of 
the cheeks, the lower portion also of the sides of the body, and the whole of the 
under parts, are pure white — each hair being uniform in colour to the root, 
and not, as is usually the case, gray at the root. There is likewise a large 
patch of pure white hairs behind each ear. The feet and tail are of a pale 
flesh-colour, and furnished with white hairs, with the exception of those on 
the upper surface of the latter, which are pale brown. The ears are also 
pale flesh-colour, clothed internally with yellow hairs ; externally on the fore 
part, the hairs are brownish, and on the hinder part, white — they are rather 
large, and so are the feet. The tail is about equal to the body in length. 
The hairs of the moustaches are numerous and slender, and most of them 
are black at the base, and gray at the apex. The hinder half of the tarsus 
* In Mus leucopus of North America the tarsus is hairy beneath, and in the character of the teeth this 
animal also agrees with the species above mentioned. 
G 2 
