nite ip diel 
SCIURUS. 119 
Color. Back and outside of arms and legs iron gray, occasionally 
with a rusty tinge; nose and forehead iron gray tinged with black; 
nape patch grizzled yellowish brown to chestnut brown; rump patch 
paler; ears grizzled gray, basal patch white; orbital ring and sides of 
head whitish; feet and hands white; under parts white, sometimes 
yellow; tail above black washed with white, beneath varying from 
grizzled gray to yellowish brown, indistinct black border and white 
edge. 
Measurements. Total length, 530; tail vertebre, 265; hind foot, 
70. Skull: average of three; basal length, 51; palatal length, 26.8; 
interorbital width, 18.6; zygomatic width, 34.3; length of upper molar 
series, II. 
e.—cervicalis (Scturus), Allen, Bull. Am. Mus. Nat. Hist., 18g, 
p. 183. 
leucops Allen, Mon. N. Am. Rod., 1877, p. 753. (nec Gray.) 
variegatus Alston, Biol. Cent. Am., Mammalia, 1, 1880, p. 127. 
aureogaster leucops Allen, Bull. Am. Mus. Nat. Hist., 1889, p. 166. 
wagnert cervicalis Allen, Bull. Am. Mus. Nat. Hist., 1898, p. 454. 
poliopus cervicalis Nels., Proc. Wash. Acad. Nat. Scien., 1, 1899, 
p. 51. 
CoLIMA MouNTAIN SQUIRREL. 
Type locality. Hacienda San Marcos, Tonila, State of Jalisco, at 
east base of Sierra Nevada de Colima, Mexico. 
Geogr. Distr. From the Sierra Nevada de Colima along high 
mountains north to Ameca, State of Jalisco, and east into western 
part of State of Michoacan, Mexico. Altitude, 6,000—12,000 feet, and 
down occasionally to 4,000. 
Genl. Char. Dark upper parts, and iron gray under surface of tail. 
Color. Back, outside of arms and legs, iron gray, sometimes 
with yellowish hairs intermixed; nose and forehead showing black 
and grayish white; nape and rump patches fulvous or rusty brown 
grizzled with black; orbital ring whitish; under parts white, in some 
specimens grizzled with black; hands and feet gray, paler than arms 
and legs; tail like back at base, rest above black washed with white, 
beneath iron gray with a black border and white edge. 
Measurements. Total length, 515; tail vertebra, 248; hind foot, 
68. Skull: average of five; basal length, 51.2; palatal length, 27.6; 
interorbital width, 19.8; zygomatic width, 34.9; length of upper 
molar series, 11.7. 
d.—colimensis (Scturus), Nelson, Proc. Wash. Acad. Scien., 1, 1899, 
pa: 
leucops Allen, Mon. N. Am. Roden., 1877, p. 753. (Part.) 
