118 SCIURUS. 
red; tail at base all around like back; above black washed with 
white, beneath mixed yellowish, or reddish brown bordered with 
black and edged with white; hands and feet white. 
Measurements. Total length, 523; tail vertebre, 263; hind foot, 
71. Skull: average of five; basal length, 52.2; palatal length, 27.3; 
interorbital width, 18.6; zygomatic width, 34.5; length of upper 
molar series, 10.7. 
a.—hernandezi (Scturus), Nelson, Proc. Wash. Acad. Scien., 1, 1899, 
p. 48. 
albipes quercinus Nels., Proc. Biol. Soc. Wash., x11, 1898, p. 150. 
(nec Erxl.) 
wagnert quercinus Allen, Bull. Am. Mus. Nat. Hist., 1898, p. 453. 
albipes hernandezt Nels., Science, N. Ser., vil, 1898, p. 783. 
Oak Woops SQUIRREL. 
Type locality. Mountains 15 miles west of the city of Oaxaca, 
State of Oaxaca, Mexico. 
Geogr. Distr. Mountains west of Oaxaca Valley into southern 
part of State of Puebla and southeastern portion of State of Guer- 
rero, Mexico. Altitude, 8,000—9,000 feet. 
Genl. Char. Similar to S. poliopus, but paler. 
Color. Above and outside of arms and legs pale gray and yel- 
lowish; nose and forehead grizzled gray tinged with black, faint yel- 
lowish and black patch on nape; ears gray, with white basal patch; 
orbital ring whitish; chin and throat white; under parts white, some- 
times tinged with buff; hands and feet white; tail above and below 
at base like back, remainder of upper part black washed with white, 
beneath yellowish gray or rusty grizzled, with an indistinct black 
border and broad white edging. 
Measurements. Total length, 540; tail vertebra, 273; hind foot, 
68. Skull: average of five; basal length, 51.5; palatal length, 26.5; 
interorbital width, 19.5; zygomatic width, 34.6; length of molar 
series, I1. 
b.—nemoralis (Scturus), Nels., Proc. Wash. Acad. Scien., 1, 1899, 
Pv 50: 
albipes nemoralis Nels., Proc. Biol. Soc. Wash., x11, 1898, p. 151. 
wagnerit nemoralis Allen, Bull. Am. Mus. Nat. Hist., 1898, p. 454. 
MICHOACAN SQUIRREL. 
Type locality. Patzcuaro, State of Michoacan, Mexico. 
Geogr. Distr. Volcano of Toluca, State of Mexico, to Nahuatzin, 
State of Michoacan. Altitude, 7,000—12,000 feet. 
Genl. Char. Similar to S. p. hernandezi, but darker above 
Possessing a melanistic phase in certain localities. 
