58), for instance, reported twelve
specimens of _peninsulae_ from 65-75 mi. NE Peking but my examination of
these mice indicates that only four are _peninsulae_ while the others
are referrable to what is currently regarded as _Apodemus sylvaticus
draco_. Another subspecies of _sylvaticus_, _A. s. orestes_, occurs in
Szechuan and Yunnan and it is certain that some records of distribution
ascribed to _peninsulae_ from those provinces actually represent
_orestes_ (see Allen, 1940:949-50). _A. sylvaticus_ is distinguishable
from _peninsulae_ by darker ears, blackish preauricular patches, dark
eye rings, a noticeably smaller skull, incisive foramina that reach the
level of Ml (or nearly so), much larger auditory bullae, and a more
fully developed posterointernal cusp on M1. Too, _sylvaticus_ typically
has 1-2=6 mammae although Allen reports finding a 2-2=8 formula in some
specimens. _Apodemus latronum_, regarded as a full species by Osgood
(1932:318) and G. M. Allen (1940:950) but as a subspecies of
_flavicollis_ by Ellerman (1949:32) and Ellerman and Morrison-Scott
(1951:567), also occurs in Szechuan and Yunnan. Its relatively dark
color, large feet and large ears, _flavicollis_-like skull and large
molar teeth immediately separate it from _peninsulae_ although the two
possibly have been confused in the earlier literature. Until a complete
revisionary study of the Asiatic members of the subgenus _Sylvaemus_ can
be undertaken the presence of _peninsulae_ in southwestern China must
remain in question.

The western limits of the geographic range of _Apodemus peninsulae_ are
unknown. _Apodemus gurkha_ Thomas, 1924, from Nepal is said to have
2-2=8 mammae but the description is not otherwise suggestive of close
relationship to _peninsulae_. Farther to the west, _Apodemus flavicollis
rusiges_ Miller, 1913, from Kashmir seems to have been properly assigned
as a subspecies of _flavicollis_ (cotypes and large series in USNM).

Wood mice almost certainly do not occur in the Gobi Desert. They are
known as far west as the Altai Mountains to the north of the Gobi and at
least as far west as Kansu (see below) to the south of it. Whether the
geographic range of the species skirts the western edge of the arid
regions of northern China is at present unknown; perhaps it does not. At
any rate, mice available to me from the North Chinese provinces of
Jehol, Shansi, Shensi and Kansu are notably different in certain
external and cranial feature