430 Dr. J. E. Gray's Synopsis of the American Squirrels 



nose, cheeks, chin, and upper part of throat, and a small spot 

 behind the ear pale grey ; throat, chest, beily, and inner sides 

 of the legs red; tail bushy, black, red-washed, with a black tip 

 and black under surface; hairs of tail pale brown at the base, 

 with a broad black ring and red tip. 



Hab. Honduras, Venezuela (Dyson) : B.M. Santa Fe de 

 Bogota (Argent) : B.M. Mexico (Parzudaki) : B.M. Isthmus of 

 Panama (Salvin) : B.M. Costa Rica, Volcan de Cartago : B.M. 



Var. Middle of the back black ; spot behind the ears yellow 

 on one side and grey on the other. 



23. Macroxus Gerrardii. 

 Sciurus Gerrardii, Gray, P. Z. S. 1861, p. 92, t. 16. 



Crown, back, rump, thighs, and base of tail dark, black- and 

 yellow-grizzled ; cheeks, chin, sides of neck and body, fore legs 

 and front of thighs, and middle portion of the tail bright red- 

 bay ; middle of thioat, chest and belly, and inner side of thighs 

 pure white. 



Hab. New Granada. Gray's type in B.M. 



C. Tail black, grey-washed, or more or less amiulated. 



24. Macroxus leucogaster. 

 " Sciurus guerlingus, Castelnau," not Shaw. 



Fur soft, full, dark olive, very closely and regularly punctu- 

 lated with yellow ; hairs lead-coloured, upper half yellow, with a 

 subterminal black band and yellow tip ; sides of nose and head 

 grey, yellow-washed ; chin, throat, underside of body, and inner 

 side of limbs white ; hairs white to the base : tail olive, under- 

 side black- and yellow-ringed on the hinder half; hairs elongate, 

 yellowish, with a narrow central and very broad subterminal 

 black ring, with a long grey or yellowish tip. 



Hab. South America, Bolivia, Santa Cruz de la Sierra (Bridges) : 

 B.M., 1846, 1847. Brazil (Castelnau) : B.M. 



The female has six teats, far apart and nearly equidistant. 



25. Macroxus Fraseri. 



Fur black, reddish-washed ; head, ears, feet, and tail black ; 

 upper part of the nose slightly varied with white hairs ; hairs 

 black, with reddish tips ; hairs of the front of the back, shoulders, 

 and outer side of the fore legs black, with a reddish-grey, narrow, 

 subterminal band ; cheeks, throat, and inner sides of limbs pale 

 red brown ; chest and belly rufous, with grey rings ; hairs lead- 

 coloured, with a red-brown tip or subterminal ring; hairs of 

 tail black, with some intermixed grey ones, of the base of the 

 tail black, with red ends. 



