In China the extent of the distribution of _Apodemus peninsulae_ is also uncertain. Allen (1940:949-50) reported its occurrence from Jehol and Hopeh in the northeast, southwestward through Shansi, Shensi and eastern Kansu to Szechuan and northwestern Yunnan. Throughout most of this region it occurs with another mouse, currently regarded as conspecific with _Apodemus sylvaticus_, and the two kinds have been confused by some previous authors. Howell (1929:58), 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).