428 Dr. J.E.Gray’s Synopsis of the American Squirrels 
hair: he gives an uncoloured figure of the latter; but it will do 
for any squirrel; the latter can scarcely be the one here de- 
scribed. The Museum specimens are much larger, the body 
and head being 114 or 12 inches long. 
See also :— 
1. Sciwrus varius, Wagner, Suppl. Schreb. 1843, ii. 168; 
S. Baird, M. N. A. 288. Hab. Mexico, Oaxaca. 
2. Sciurus albipes, Wagner, K. B. Akad. iti. 500; Schreb. 
t. 213 p. 
?Sc. variegatus, Erxleben, Syst. 1777, p. 421; Baird, M. N. A. p. 282. 
Above mixed white, black, and ferruginous; beneath ochrey 
ferruginous, feet and shoulders brown ; ears white; tail centri- 
cally ferruginous, on sides banded with black and white. Hab. 
Mexico. 
3. Sciurus socialis, Wagner, Abh. K. Bay. Akad. ii. 504, t. 5; 
S. Baird, M. N. A. 288. 
Above mixed white, cinereous, and yellowish; beneath pale 
rusty yellow; ears fulvous ; feet white; fur soft, a tuft of snow- 
white hair behind the ears; tail rusty red beneath, then black, 
and bordered with white. Hab. Mexico. 
II. Fur short, soft, olive-brown, black- and yellow-punctulated, 
rarely red-washed ; hairs black- and yellow-ringed. Moderate- 
sized or small. 
A. Middle-sized. Tail black; fur very short, of the belly sparse ; 
hairs black at the base, with a pale ring. 
17. Macroxus fumigatus. 
Fur short, soft, black, very mimutely punctulated with yellow ; 
hairs black, with a small yellow subterminal band; crown, feet, 
and tail black ; hairs of tail black to base; sides of nose, cheeks, 
and temple brown, punctulated with black ; throat and underside 
only slightly covered with short, soft, distant blackish hairs. 
Hab. Brazil, Upper Amazons (Bates). B.M. 
Known from all the other species by the shortness of the soft 
black hairs. 
B. Moderate-sized. Tail black, red-washed or -varied; fur mo- 
derately soft. 
18. Macroxus Langsdorfii. 
Sciurus Langsdorfii, Brandt, Mém. Acad. Pétersb. 1835, ii. 425, t. 11. f.1. 
Fur olive, black-and-grey mixed ; hairs black, with an orange 
subterminal band: tail very full, clavate, black, washed with 
