ot
differ otherwise. Of two specimens reported from Jalapa, Veracruz, by
Osgood (1909:158), one (108547 USNM) agrees with specimens from Mirador
in color and cranial characteristics and is _P. aztecus_, whereas the
other (108548 USNM) is _P. b. beatae_.

_Specimens examined._--Total 16 (all USNM) as follows: PUEBLA:
Huachinango, 6. VERACRUZ: Mirador, 9; Jalapa, 1.

#Peromyscus boylii levipes# Merriam

1898. _Peromyscus levipes_ Merriam, Proc. Biol. Soc.
Washington, 12:123, April 30, type from Mt. Malinche, 8400
ft., Tlaxcala.

1909. _Peromyscus boylei levipes_, Osgood, N. Amer. Fauna,
28:153, April 17.

_Geographic distribution._--Southeastern Tamaulipas and eastern
San Luis Potosi, south through the central states of Mexico to
Guatemala.

_Diagnosis._--Size medium for the species; tail shorter or
longer than head and body (83-112.3%); color variable according
to locality but in general ochraceous, having some dusky on
upper parts; supraorbital border not angular, almost rounded;
auditory bullae large.

_Comparisons._--For comparisons see accounts of the subspecies
discussed beyond and Osgood (1909:145).

_Remarks._--A precise diagnosis for _P. b. levipes_ is difficult to
prepare because some geographic variation in color and in the cranial
characters is present within the range of the subspecies as here
understood. For instance there is a gradual cline of decreasing size to
the northward in nearly all measurements, but the ratio of length of
tail to length of head and body does not present such a cline; mice
from several localities in San Luis Potosi have a relatively shorter
tail than do mice from farther north and from farther south. Also,
specimens labeled in reference to Zacualpilla, Jacales, Jacala,
Tulancingo, and San Miguel Regla average slightly darker dorsally than
do typotypes. Some of these specimens are reddish on the cheek and
lateral line. Specimens from San Luis Potosi resemble topotypes, but
some specimens from northeastern localities in that state have cinnamon
or brownish upper parts and are intermediate in coloration between
populations of _levipes_ to the south and populations of the same
subspecies to the north from the Sierra Madre Oriental and the Sierra de
Tamaulipas. Specimens from these two sierras have a cinnamon-reddish
color that is more intense in specimens from the Sierra de Tamaulipas.

Osgood