MAMMALS OF NORTHERN COLOMBIA—HERSHKOVITZ 21 
from La Gloria, Rio Magdalena, “appears to be typical.’”’ As is 
shown, the squirrels taken at the same locality are typical. Those 
taken on the opposite side of the river at the northern base of the 
Cordillera Central are quite distinct and on the basis of the original 
description and figure could not be identified with variabilis. The 
squirrels from a short distance lower down the Magdalena, at the 
mouth of the Cesar, also differ, though to a lesser degree, from the 
original description as well as from the typical specimens. They are 
uniformly reddish, lacking the black on the back and tail. Those 
’ from near the mouth of the Magdalena (Ciénaga de Gudjaro) are 
typical granatensis and even paler than the Rio Cesar squirrels. 
On the basis of present material it appears that variabilis has closer 
affinities with the squirrels of the Cordillera Oriental than with those 
of the lowlands farther down the Magdalena. The series of tarrae 
(nomen novum) from Guamalito in the Cordillera Oriental east of La 
Gloria are intermediate in all characters between variabilis and topo- 
types of tarrae described from the opposite side of the range. Higher 
up the right bank of the Magdalena, in the Department of Santander, 
variabilis gives way to squirrels with red bellies and black-tipped tails, 
quite characteristic of zuliae. 
Specimens examined.—Seven. Lectotype and cotype (M.N.H.N.); 
La Gloria, 3 (U.S.N.M.); Aguachica, 2 (C.M.). 
SCIURUS GRANATENSIS NOROSIENSIS, new subspecies 
Holotype.—Adult male, skin and skull, U.S.N.M. No. 279949; 
collected June 26, 1943, by Philip Hershkovitz; original No. 2150. 
Type locality.—Norosi, Mompés, Department of Bolivar, Colombia; 
altitude 120 meters. 
Distribution.—In the Department of Bolivar, the base and lower 
eastern slopes of the Cordillera Central to the west bank of the Rio 
Magdalena. 
Characters.—Bright agouti, with relatively weakly contrasting 
shoulder regions, underparts reddish; upper parts paler, with less 
black, and underparts redder, than zuliae and chrysurus. 
Coloration of holotype.—Dorsal surface orange-rufous to ochraceous- 
orange evenly mixed with black; sides of body, shoulder regions, dorsal 
surfaces of upper arms and thighs with less black. Crown and nape 
like lower part of back; cheeks, lips, chin ochraceous, orbital ring 
well-defined orange. Underparts and fore and hind feet orange-rufous 
to mars orange. ‘Tail above, except for mixed buffy and black basal 
portion, orange with black of undersurface showing through, beneath 
tricolor with orange on outer border, black in the middle and mixed 
black, orange, and buff on inner border. 
