1915.] Allen, Review of the South American Sciuride. geo 
approaching typical hoffmanni, the mid-dorsal region being only slightly 
darker than the flanks in two, while the other two agree with the type. 
Specimens from El Eden, on the eastern slope of the Central Andes, are 
indistinguishable from specimens of hoffmanni from Las Lomitas, San An- 
tonio, and other points in the Western Andes, and also from those from Mira- 
flores in the Central Andes. Specimens from near Bogota (eastern slope 
of the Eastern Andes) are referable to M. hoffmanni hyporrhodus (Gray), 
They show, however, a tendency to a darkening of the mid-dorsal region, 
several specimens from Fusugasugé and Panama being in this respect simi- 
lar to typical examples of quindianus. Both forms agree in the deep orange 
red of the belly and the upper surface and edges of the tail. The relation- 
ships of these two forms, as regards coloration, may be expressed as follows: 
quindianus is normally a black-backed form, with occasional specimens in 
which the dorsal band is poorly developed; hyporrhodus is normally without 
a dark dorsal band, with occasional specimens in which it is more or less 
shown. It is pretty evident that both intergrade with hoffmanni to the 
southward in both the Eastern and Central Andes and probably in the 
Western Andes. 
Mesosciurus hoffmanni hyporrhodus (Gray). 
Scturus hyporrhodus Gray, Ann. and Mag. Nat. Hist. (3), XX, p. 419; Dec. 1867 
(Santa Fé de Bogoté). } 
Type locality.— Santa Fé de Bogota, Colombia. Type; No: 41.919, 
British Museum. Parzudaki. | 
Geographical distribution.— Bogota district, Eastern Andes, Colombia. - 
Description.— Upperparts dull yellowish to reddish olive (in different 
specimens), the latter phase prevailing, the middle of the back sometimes a 
little darker than the sides; underparts orange yellow to deep orange red — 
(in different specimens), the latter phase prevailing; tail at base, both above 
and below, like the back; middle two thirds of the tail heavily washed with 
orange rufous (varying in tone in different specimens), the hairs basally 
ringed with buffy yellow and black, the black greatly prevailing, with long 
orange yellow or orange red tips; under surface of tail more or less similar 
to the upper; tip of the tail with a broad subapical area of black, the extreme 
tip of the hairs some shade of orange; ears nearly concolor with the top of 
the head, with or without a conspicuous postauricular buffy patch of soft 
hairs; upper surface of the feet nearly like the sides, the hairs being minutely 
tipped with fulvous or rufous. 
Total length (4 specimens, Fusugasugé), 393 (378-408); head and body, 
220 (195-245); tail vertebrae, 194 (172-211); hind foot (ec. u.) 59 (56-62). 
