s from other known races of _Apodemus
peninsulae_ and are here given subspecific recognition. All measurements
are in millimeters. Capitalized color terms are from Ridgway (1912).

Apodemus peninsulae sowerbyi, new subspecies

_Type._--Adult female molting from winter to summer pelage, skin
and skull, U. S. National Museum no. 175523, from 30 miles west of
Kuei-hua-cheng, 7000 ft., northern Shansi, China; obtained on 23
May 1912 by Arthur de Carle Sowerby, original no. 456.

_Distribution._--Known presently from eastern Kansu eastward
through Shensi, Shansi and Hopeh to southern Jehol, probably also
in northeastern Szechuan, exact limits of range unknown.

_Diagnosis._--Size small for species (see measurements). Color:
Upper parts (fresh summer pelage) averaging near (15'_a_)
Ochraceous-Buff, suffused with blackish (especially mid-dorsally);
winter pelage much paler; underparts grayish-white, individual
hairs plumbeous at base, tipped with white; ears pale brownish;
feet whitish above, darker below; tail bicolor, pale brownish
above, whitish below. Skull: Small (see measurements); rostrum
somewhat shortened and conspicuously down-curved; zygomatic notches
relatively shallow; zygomatic plates narrow; braincase
proportionally more inflated than in other subspecies of the
species; auditory bullae moderately inflated; upper incisors
slender, their faces averaging bright yellowish-orange.

_Measurements._--External measurements of the holotype, followed by
those of an adult male and female from the type locality, are,
respectively: Length of head and body, 101, 102, 100; length of
tail, 93, ----, 102; length of hind foot (_su_), 21, 21.5, 23;
length of ear from notch, 14, 16, 15.5. Corresponding measurements
for an adult female from 20 mi. E Taiyuan, Shansi, are: 91, 99, 23,
16. For cranial measurements see Table 1.

Table Key:

A: Occipitonasal length
B: Zygomatic breadth
C: Mastoid breadth
D: Interorbital length
E: Frontonasal length
F: Nasal length
G: Depth of skull
H: Alveolar length of maxiary tooth-row

TABLE 1.--CRANIAL MEASUREMENTS OF ADULTS OF SEVERAL SUBSPECIES OF
APODEMUS PENINSULAE
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Sex | | | | | | | | |
and catalogue | A |