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; fee't 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 vertebrae, 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, n. 



c. cervicalis (Sciurus), Allen, Bull. Am. Mus. Nat. Hist., 1890, 



p. 183. 



leticops Allen, Mon. N. Am. Rod., 1877, p. 753. (nee Gray.) 

 variegalus Alston, Biol. Cent. Am., Mammalia, i, 1880, p. 127. 

 aureogaster leucops Allen, Bull. Am. Mus. Nat. Hist., 1889, p. 166. 

 wagneri cervicalis Allen, Bull. Am. Mus. Nat. Hist., 1898, p. 454. 

 poliopns cervicalis Nels., Proc. Wash. Acad. Nat. Scien., i, 1899, 



P- 5 1 - 

 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 vertebras, 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. 



//. colimensis (Sciurus), Nelson, Proc. Wash. Acad. Scien., i, 1899, 



P- 5 2 - 

 Icncops Allen, Mon. N. Am. Roden., 1877, p. 753. (Part.) 



