432 Dr. J.E.Gray’s Synopsis of the American Squirrels 
depressed, and reddish-washed. There are three specimens: 
the one marked “a female” is much redder beneath than the 
other two, which also appear to be of the same sex. 
29. Macroxus flaviventer. 
Sciurus flaviventer, Castelnau, MS. B.M. 
Fur very close, blackish olive, very closely and minutely punc- 
tulated with yellow on the head and sides of the body; middle 
of back blacker; hairs very short, close, black, with a yellow 
tip; cheeks, nose, chin, throat, and chest scarcely punctulated ; 
under part of the body and inner side of the limbs reddish yel- 
low, hairs yellow to the base; ear-tuft small, yellow: tail de- 
pressed, narrow, blackish, yellow- washed, especially near the 
end; hairs yellow at the base ; 3 upper half black, with a yellow 
tip. 
Hab. Brazil (Castelnau). B.M. 
like M. estuans, but smaller and darker, especially on the 
middle line of the back; the cheeks and chin yellow, like the 
underside ; the tail depressed, pennate, very narrow. 
30. Macrozxus estuans. 
Sciurus brasiliensis, Maregr. B. 230; Seba, i. 78, t. 48. f. 8. 
Sc. estuans, Linn. S. N. i. 88; Kuhl, Beitr. 68; Pr. Max, Abbild. t. 
Myoxus guerlingus, Shaw, Z. ii. 171, t. 156. 
Macrozxus estuans, Lesson. 
Le grand Guerlinguet, Buff. H. N. Suppl. vii. 261, t. 65. 
Fur soft, close, dark olive, very minutely punctulated with 
yellow ; hairs very short, lead-coloured, with a narrow yellow 
subterminal ring and a black tip ; cheeks, chin, and upper part 
of throat greyish; chest and beneath, and inner sides of limbs 
yellow or reddish yellow: tail cylindrical, black, grey-washed ; 
hairs yellowish, with two narrow inferior and a broad black 
subterminal ring and more or less grey tips. Ear-tufts none. 
Hab. sre Para (Graham): B.M. Bay of Honduras 
(Warwick) : 
Var. 1. Chest and belly yellow in the middle, grey on the 
sides. Para (Graham). B.M. Female’s teats four on each side, 
surrounded by a fulvous spot. 
Var. 2. Chest and front of under surface yellowish; belly 
whitish grey. Brazil. B.M. 
Var. 3. Chest, underside, and the inner sides of the front 
legs whitish grey ; inner sides of hind legs and middle line of the 
belly slightly yellow-washed. Brazil. B.M. 
Var. 4. Throat, central line of chest and belly, and inner sides 
