18 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 97 
Distribution.—The valley of the Rio Cesar, possibly extending 
northward to the Guajira Peninsula and the lowlands on the easi 
side of the Rio Magdalena from its junction with the Cesar, down- 
stream possibly to its mouth. 
Characters—More or less uniformly colored reddish or orangeous 
on back and sides, underparts white; darker than granatensis; paler 
than variabilis, without the heavy suffusion of black on back, the tail 
fairly uniformly colored. Size as in variabilis; larger than granatensis. 
Coloration.—Each of the series assigned to splendidus is described 
under the heading of its locality. 
Purrto EstrEeLLA (3 specimens): Pelage thin, hairs comparatively 
short and stiff; back, sides, and tail, mars orange with a slight mottling 
of burnt sienna, the hairs without black tips or annulations; sides 
of face xanthine orange; underparts white as in granatensis. The 
series is practically topotypical of both splendidus and magdalenae. 
Mipp.eE Rio Cxsar (36 males and 30 females, from El Orinoco and 
Rio Guaimaral): Back orange-rufous to mars orange and burnt 
sienna with hairs less red toward their bases and with or without 
fine black tips. Crown, ears, sides of body and neck, throat, fore 
and hind limbs on outer sides like back. ‘Tail generally like back, 
the hairs orange at base, redder terminally, sometimes a dark sub- 
terminal band on hairs of distal one-fifth to one-half of tail. Ros- 
trum, cheeks, and chin orange to xanthine orange. Belly, chest, 
and ventral surface of neck sharply defined white; inner sides of 
upper arms and hind legs to varying lengths white, remainder of 
limbs like sides. The Rio Guaimaral series, on the whole, averages 
slightly paler than the El Orinoco series. 
Two color phases are represented here: the lighter one is orange- 
rufus; the darker, mars orange (or like burnt sienna if the fine black 
tips of the hairs are taken into account). Some individuals “are 
uniformly of one color or the other; other specimens may be irregularly 
mottled with both colors or, as in one specimen, the paler anterior 
half of the back is separated from the darker posterior half by a molt 
line. In a few specimens there is an indication of a fine dark ticking, 
or agouti, on the rump. Occasionally, spots of orange appear on 
the white of the undersurface. There may be a few white hairs 
interspersed over the back. The tendency toward a tricolor pattern 
on the underside of the tailis very weak. In the majority of individu- 
als even a bicolor effect is nearly suppressed, owing to the very short 
paler basal portions of the hairs. 
VILLANUEVA (3 males, 2 females): Back, sides, crown, and limbs 
except for white ventral portions, xanthine orange mottled or mixed 
with mars orange; one specimen with large irregular patches of mars 
orange. Tail, above and below, fairly uniformly orange-rufous or 
mars orange but with slightly darker tips in two specimens. Sides 
