in the Collection of the British Museum. 423 



4. Macroxus nicoyana. 



Fur rather thick and abundant^ yellowish iron-grey; hairs 

 black, with a broad subterminal white band ; shoulders, thighs, 

 legs, and sides of the body rufous- washed; tail black, very slightly 

 punctulated ; head white iron-grey; cheeks and chin pale grey; 

 ear-tuft large, white ; throat, underside, and inner sides of the 

 legs bright red brown, varied with large white subsymnietrical 

 blotches : tail black, white-washed, hairs black (those of the 

 underside of the tail more or less brown at the base), with a 

 long white tip. Head and body 12 inches long. 



Hab. Costa Rica, Nicoya (0. Salvin). B.M. 



The white on the underside is perhaps an individual pecu- 

 liarity. 



5. Macroxus aureogaster. 



Sciurus aureogaster, F. Cuv. Mamm. Lithog. Ixx. t. ; Geoff. Vov. Venus, 



Zool. 1866, p. 136, 1. 10,11. 

 Sc. leucogaster, F. Cuv. ; Sp. Baird, M. N. A. 282. 



Dark iron-grey ; crown of head, nose, and feet blacker ; sides 

 of the body, thi-oat, chest, belly, inner sides and edges of the 

 limbs red brown ; hairs black, mixed with grey or red tips : tail 

 bushy, black, white- washed; hairs red yellow at the base, then 

 black, with long grey tips. 



Hab. Columbia. 



Var. 1. Red, darker chestnut on the shoulders and front 

 part of the back ; hairs of tail black at the base, with a yellowish 

 ring, and then black, with grey tips. 



Var. 2. Fur with a redder tinge ; hair lead-coloured, then ru- 

 fous, with black rings and grey tips ; nape, shoulders, rump, and 

 outer sides of thighs reddish; tail-hairs red at the base, then 

 black, with grey tips. 



Sciurus aureogaster, I. GeoflF. Voy. Venus, t. 11, ? . 



Hab. " Mexico " (F. Cuvier) . South America (Verreaux) : 

 B.M. Columbia (Parzudaki) : B.M. 



These squirrels were received from Parzudaki and Verreaux 

 as the S. aureogaster of F. Cuvier. The last variety is somewhat 

 like I. Geoffroy's figure of the female in the Voy. of the Venus, 

 t. 11. 



I have not seen any specimens like those figured as varieties 

 of the same species in tab. 10 of that work, which appear to be 

 nearly white, with reddish nape and rump, the colour of the 

 underside not being shown. 



29* 



