24 PROCEEDINGS OF THE NATIONAL MUSEUM VOL, 97 
on back and sides (xanthine orange to orange-rufous) and quite like 
specimens from the intermontane valley of the upper Rio Cesar. One 
specimen is nearly uniformly agouti on dorsum and sides and shows a 
fine narrow black lateral line. Fore and hind feet may be orangeous, 
reddish, black, or mixed with a combination of these colors. There 
is a tendency here for the development of weak, pale postauricular 
tufts. Tails on upper surface orangeous or reddish, the tips, in some, 
mixed with black; on underside uniformly reddish, bicolor (reddish 
and orangeous), or tricolor (reddish, black, and either orangeous or 
mixed as in holotype). Underparts white with a notable tendency 
for reddish of sides to encroach, especially on belly and limbs. 
LAGUNA DE JUNCO, SIERRA DE PrrisA (1 female): Specimen taken 
by M. A. Carriker, Jr., from the same general region as the others but 
from a higher altitude (8,000—-9,000 feet). Like holotype but paler, 
with less contrasting shoulder regions, feet darker. In color of back, 
sides and character of pelage, it more nearly resembles representatives 
of meridensis from the Paramo de Tamé than any of the topotypes of 
perijae. 
Las Marimonpas (8 males, 8 females): The series was taken on 
the summit and both slopes of the Montes de Oca (Sierra de Perijé), 
at altitudes ranging from 800 to 1,500 meters. It includes examples 
from both the Rio Rancheria and the Lake Maracaibo drainage sys- 
tems. All individuals are of the contrasting type (4ab and 4ac, see 
p. 9). The agouti to black of ramp extends forward as a well-defined 
median dorsal band on anterior half of back and continues onto nape 
and crown. ‘Tails above reddish or orangeous with tips either mixed 
with black or entirely black; beneath, bicolor (reddish with either 
black or mixed orangeous and black), or tricolor, more or less as in 
holotype. Underparts from white as usual but with some patches of 
reddish to completely reddish; generally the individuals with more 
black on dorsum show also more black on tails and less white on 
underparts. One specimen with hind feet white, the color continuous 
with white line on ventral surface of limbs. Unlike one of the topo- 
types of agricolae with white feet, its soles show only a trace of 
albinism. 
This series represents an intergrading population between the topo- 
types, maracaibensis and tarrae. About half of the series, where the 
contrasting agouti pattern (4ab) predominates, agrees well with 
average specimens of the type series while individuals of the remaining 
half, where the contrasting black pattern (4ac) predominates, could 
be assigned to either maracaibensis or tarrae. 
Remarks.—The high degree of variation in perijae is analogous to 
that of agricolae and saltuensis, which, together, inhabit approximately 
the same altitudinal levels of the Sierra Nevada on the opposite side 
of the Cesar Valley. The lower opposing slopes of the two mountain 
—-_ = 
