1915.] Allen, Review of the South American Sciuride. 207 
Description.— Similar to ignitus in size and general coloration, but 
color of underparts rather paler. 
Four adult specimens, all females, from Inca Mines (lat. 13° 30’ o, 
long. 70°, alt. 6000 ft.) collected and measured by H. H. Keays: Total length 
349.5 (843-356); head and. body, 184 (178-197); tail vertebree, 165 (159- 
178); hind foot (s. u.), 45.2 (44.5-47.6). 
Four skulls from Inca Mines, Peru, occipito-nasal length, 45.5 (44.546); 
zygomatic breadth, 26.5 (26-27); interorbital breadth, 14.5 (13-15); 
breadth, of braincase, 20.9 (20.5-21); length of nasals, 12.6 (12-13.3); 
diastema, 11.2 (10.2-11.5); upper molar series, 6.9 (6.5-7). 
Specomens examined, 13.—Peru: Ocabamba, 2, type and topotype of 
cuscinus; Rio Yimimpare, 2; Maracapata, 3; Pachita, 1; Inca Mines 
(Carabaya Range), 5 (all in Brit. Mus. except the Inca Mines specimens, 
which are in Am. Mus.). 
Remarks.— As already noted, the type locality of ¢rroratus was the 
upper Rio Ucayali. Its range occupies, as stated by Thomas (for his 
“cuscinus’’), the region drained by the upper Ucayali and Madre de Dios 
Rivers. Sciwrus cuscinus was originally described from two specimens from 
Ocabamba, Province of Cuzco, Peru, collected by Otto Garlepp in 1897, and 
from whom were later received (in 1903) at the British Museum six other 
specimens from nearby localities. In 1900 five specimens were received at 
the American Museum from Inca Mines, Carabaya Range, Peru, collected 
by H. H. Keays. All are from the Andean region of southeastern Peru, 
at 6000 to 8000 feet altitude. 
Leptosciurus leucogaster (Gray). 
Plate VII, Figs. 18, 14; Plate XIII, Figs. 9, 10. 
Macroxus leucogaster GRAY, Ann. and Mag. Nat. Hist. (8), XX, p. 430, Dec. 1867. 
Not Sciurus leucogaster F. Cuvier, 1831 = S. aureogaster F. Cuvier, 1829. 
Type locality.— Santa Cruz de la Sierra, Bolivia; coll. Bridges. 
Geographic distribution.— Provinces of Santa Cruz de la Sierra and del 
Sara, eastern Bolivia, and westward into La Paz Province. : 
Description.— Pelage short and thin. Mamme 6. Upperparts olive, 
minutely punctated with yellow; eyerings and sides of nose pale buff; 
underparts white nearly or quite to the base of the hairs, varying in different 
individuals; tail broad, above like the back, edged with pale yellow; under 
surface of tail grizzled black and pale buff medially, the hairs with a broad 
subterminal band of black and pale yellow tips; ears long, pointed, yellowish 
brown externally, rusty yellow internally, with a buffy yellow postauricular 
