tooth-rows, larger
external auditory meatus, and narrower palatine breadth.
_Neotoma angustapalata_ differs from the description of _N.
distincta_ in having a faintly bicolored tail, no ochraceous
pectoral band, broadly concave sides to interpterygoid
fossa, and narrower palatine breadth.

_Remarks._--_Neotoma angustapalata_ is represented by two specimens;
the type and another specimen, an adult male, no. 37062, with skin and
broken skull. The description takes into account both of these
specimens. The most significant characteristics of _N. angustapalata_
are its scaly-appearing tail with short, sparse hairs, dusky
underparts, broadly concave sides of the interpterygoid fossa at the
posterior end of molariform tooth-rows, and the narrow palatine
breadth. Among named kinds of _Neotoma_, the newly named species most
closely resembles _N. torquata_ and _N. distincta_; however, it is
geographically widely separated from these two species. _Neotoma navus_
of southeastern Coahuila is the only other member of the _N. mexicana_
group in northeastern Mexico.

These wood rats were taken in rocks and crevices at the base of a small
hill in thick vegetation growing in deep humus. Schaldach termed the
trapping site as "arid tropical tending toward humid tropical".

_Measurements._--The subadult, male holotype measures as
follows: Total length, 325; length of tail, 154; length of
hind foot, 36; length of ear from notch, 29; basilar length
(of skull), 33.9; zygomatic breadth, 22.1; interorbital
breadth, 5.7; length of nasals, 15.2; length of incisive
foramina, 8.7; length of palatal bridge, 8.5; least breadth
of palate between first upper molars, 2.7; greatest breadth
of interpterygoid space, 4.1; alveolar length of upper
molariform tooth-row, 9.6. The adult, male, no. 37062,
measures as follows: Total length, 380; tail vertebrae, 195;
hind foot, 42; ear from notch, 31; interorbital breadth (of
skull), 6.4.

_Specimens examined_, 2, from the type locality.

~Rattus rattus~ subsp.

Black Rat

_Specimens taken_, 2 from 70 km. [by highway] S Ciudad
Victoria and 6 km. W of the [Pan-American] highway [at El
Carrizo].

~Mus musculus~ subsp.

House Mouse

_Specimen examined_, 1 from 12 km. N and 4 km. W Ciudad
Victoria.

~Nasua narica tamaulipensis~ Goldman

Coati

_Nasua narica tamaulipensis_ G