Descriptions of East Asiatic Mammals 277 
The popular name is not precisely suitable; ' 'monkey- footed" 
would have been preferable, since the foot, not the hand, has 
the first digit opposable. There are 4 inguinal nipples. The dorsal 
color of P. m. parvus is tawny, the bases of the hairs gray; the 
ventral color is clear white. The tail is black. The length of the 
head and body is 5 inches, tail 5% inches, hind foot 1 inch. 
The Burma Tree Mouse, Chiromyscus chiropus, appears 
somewhat like Rattus but has the hind foot specialized for climb- 
ing. The claws are short and the foot, with the great toe oppos- 
able, is hand-like. There are 8 nipples in the females. The color 
is "warm lined buffy," with the cheeks and rump rich ochra- 
ceous ; a dark area surrounds each eye. The length of the head 
and body is 5 inches, tail 8 inches, hind foot 1*4 inches. This 
Mouse occurs in the Karin Hills, in central Laos, Burma, and in 
Tonkin. 
The House Mice, genus Mus, are distinguished by the rela- 
tively great size of the first of the three molar teeth and the 
small size of the last (third) one. There are three primary divi- 
sions of the House Mice in eastern Asia, which for practical 
purposes will be treated here as genera, although they are some- 
times considered merely subgenera. These are Mus proper, con- 
taining all the temperate-zone forms and extending into the 
warmer parts of Asia ; Leggada, the Jungle Mice ; and Legga- 
dilla, the Flat-haired Jungle Mice, the last two chiefly Indian. 
The True House Mice, Mus, in a restricted sense, are con- 
sidered by at least one scientist as all referable to a single 
species. That species he divides into numerous subspecies or 
races. The typical and most widely known one is, of course, the 
Common House Mouse, Mus musculus, now widely distributed 
in the coastal regions of most of the world but once known only 
in Europe. In four cases out of five, this is the little wretch that 
infests poorly constructed food closets and eats our cheese and 
crackers. A mouse of this kind was once almost the basis of a 
lawsuit. One was found dead in a bottle of Indian chutney. The 
