282 Bulletin American Museum of Natural History. [Vol. XXXIV, 
rufous instead of whitish, and the feet deep black. In still another speci- 
men the rump, hind limbs, and base of tail are pale yellowish rufous, the 
underparts rusty brown with the hair tips lighter, and the fore and hind 
feet pale rufous with only the toes black, those of the hind feet mixed rufous 
and black. Three of the above mentioned four specimens are profusely 
spotted on the fore-back, shoulders, limbs, throat and breast, with irregu- 
larly distributed tufts of projecting stiff white hairs, due probably to in- 
Juries caused by bites of insects. They are more or less commonly seen in 
all the squirrels, both large and small, occurring in the humid tropical coast 
belt from Peru northward to Central America. 
Another series of 4 specimens from Daule, situated about 50 miles 
northwest of Guayaquil, parallels the 4 specimens from Guayaquil in re- 
spect to individual color variation. In one the ventral surface is quite 
heavily washed with rufous; in another the feet are rufous to the base of 
the toes, and in others the rufous of the tarsal and carpal regions extends on 
to the proximal portion of the foot. 
The only external measurements available are the collector’s measure- 
ments of the Daule specimens, 3 adult females: total length, 585 (570-620 
mm.); head and body, 283 (260-320); tail vertebree, 303 (300-310); hind 
foot, 60 (all 60). An adult male from Guayaquil, total length, 630; head 
and body, 300; tail vertebree, 330; hind foot, 65. 
Five skulls (Guayaquil, 1, Daule, 4; 2 77, 3 2 9 ), total length, 58 
(57-60); zygomatic breadth, 32.2 (32-33); interorbital breadth, 19 (18-20); 
postorbital breadth, 17.5 (17-18); breadth of braincase, 22.7 (22-23.5); 
nasals, 16 X 8.6 (15-17 X 8-9); diastema, 14.2 (14-14.5); maxillary 
toothrow, 10.3 (10-10.5). The skull is small relatively to the external. 
measurements, with heavy dentition, and short, broad nasals, their breadth 
at the front border about one half of the length. 
Specimens examined, 8.— Ecuador: Guayaquil, 4 (Am. Mus. 1, Nat. 
Mus. 2, Mus. Comp. Zoél. 1); Daule, 4 (Am. Mus.). | 
Remarks.— This was the first described form of the large, long-tailed 
squirrels peculiar to the western slope of the Andean region of Ecuador 
and Peru, of which several others have since been recognized. 
Simosciurus stramineus nebouxii (Js. Geoffroy). 
Sciurus nebouxii Is. Gzorrroy, Voy. de la Venus, Zool., 1855, p. 165, pl. xii.— 
ALLEN, Mon. N. Amer. Rodent., 1877, p. 773. 
Sciurus stramineus Auston, Proc. Zool. Soc. London, 1878, p. 664, part.— 
ALLEN, Bull. U. 8. Geol. and Geogr. Surv. Territories (Hayden), IV, No. 4, p. 883, 
part. 
Sciurus stramineus nebouxit THomas, Ann. and Mag. Nat. Hist. (7), V, p. tot: 
Jan. 1900 (in text). 
