116 SCIURUS. 
States of Vera Cruz, eastern San Luis Potosi, Queretaro, Puebla, and 
northeastern Hidalgo and northern Oaxaca, up to 4,000 and 8,000 
feet. 
Genl. Char. Size large; coloring varied, under parts ferrugineous 
to dark rufous; tail long. 
Color. Above varying from iron gray to whitish gray; nape 
yellowish brown or rusty rufous; orbital ring deep buff; between eye 
and ear yellowish brown; chin and cheeks grizzled gray; arms and 
hands iron gray; feet varying from blackish to iron gray; under parts 
and sometimes a band over shoulders and outer side of arms, bright 
ferrugineous; ears gray to rusty red; tail at base like back, remainder 
above black, washed with white, beneath ferrugineous, with a black 
border edged with white. 
Measurements. Total length, 539; tail vertebra, 265; hind foot, 
67. Skull: average of five; basal length, 49.8; palatal length, 26.5; 
interorbital width, 19.1; zygomatic width, 34.5; length of upper 
molar series, 11.3. 
a.—hypopyrrhus (Scturus), Wagler, Isis, 1831, p. 510. 
morio Gray, Ann. Mag. Nat. Hist., 3d Ser., xx, 1867, p. 424. 
maurus Gray, Ann. Mag. Nat. Hist., 3d Ser., xx, 1867, p. 425. 
vartegatus Sumichrast, La Naturaleza, vil, 1887, p. 360. 
aureogaster! Allen, Bull. Am. Mus. Nat. Hist., 111, 1890, p. 181. 
(nec Cuv.) 
FIRE-BELLIED SQUIRREL. 
Type locality. Mexico. State of Vera Cruz ? 
Geogr. Distr. Southern part State of Vera Cruz, and States of 
Tabasco, Oaxaca, and Chiapas, Mexico. 
Genl. Char. Darker than S. auretgaster. 
Color. Above grizzled with black, rusty or grayish white; fore 
part of crown and nose iron gray; nape grizzled rufous or brownish; 
orbital ring brownish buff; chin and cheeks grayish; under parts 
deep ferrugineous, this color covering arms and forming a band on 
shoulder; outside of thighs grizzled like back; hands and feet black 
or grizzled with gray; tail at base like back, rest black washed with 
white, beneath ferrugineous with a black border and white edge; 
sometimes for ferrugineous black is substituted; ears gray or red- 
dish brown, sometimes with black border, and a basal patch in 
winter, grayish white. 
Measurements. Total length, about 522; tail vertebrae, 266; hind 
foot, 67. Skull: average of five; basal length, 52.6; palatal length, 
27.1; interorbital breadth, 18.4; zygomatic breadth, 34.8; length of 
upper molar series, 11.4. 
