SCIURID^— SCIURCS ADREIGASTER. 



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and (lie rufous tint of the lower parts from rcddisli-orungo to strong reddish- 

 brown or ficry-chcstnut. One specimen (No. 7205) is wholly blaek, very 

 minutely sprinkled on the sides with reddish-gray ; tiic hairs of the tail 

 wlioUy IdacU to the base. Another (No. 3923) is diiKky, with the middle of 

 tiie back, the feet, most of the head, the ears, and the tail l)lack ; sides and 

 most of the dorsal surface varied witii pale rcddisli-brown ; lower parts mixed 

 blaek and rufous. Anc her (No. 8489) is blackish above, varied with white, 

 with a faint rufous tinge across the shoulders; whole top of the head, feet, 

 and exterior of hind limbs i)lack, the former slightly varied with -.thitifih ; 

 cheeks and chin gray ; whole lower surface intense orange-red ; tiiil below 

 wholly black, except a narrow mesial line of mixed rufous and black toward 

 the base; upper surface of toil mixed white and black. In No. 7203, the 

 red of the lower surface extends high up on the sides, meeting over Mic 

 shoulders, and more or less tinges the whole dorsal surface, except the head, 

 which is clear blackish-gray. Tail centrally more or less red belov/. In No. 

 7847-, the lower surface is fiery-orange, which color impinges upon the dorsal 

 surface at the shoulders, not, h'"wever, extending quite to the median line. 

 The rest of the dorsal surface is clear blackish-gray. Tail below broadly 

 centred with rufous. In No. 7848, the colors have the same distribution, 

 bot the gray of the upper parts is lighter, the white predominating over the 

 black. The middle of the tail below is deep reddish-brown throughout, bor- 

 dered by a broail band of black, and edged and tipped with white. In No. 

 32G2, the iMsterior half of the back is nearly white. In No. 6352, while the 

 distribution of the color is the same os in No. 7848, the color below is dark 

 red, which prevails over the shoulders with almost the same intensity as below. 



Except where the tints are obscured by melanism, the pattern of the 

 coloration remains quite constant, the variation being mainly in reference to 

 the varying proportions of black and white of the upper parts, in the intensity 

 of the red of the lower surface, and in the extent of its encroachment np<m 

 the dorsal surface. 



The SciuriM aureosoiter of F. Cuvier, as shown by the description and 

 figure, especially the latter, refers unquestionably to this species. The S. 

 aurcogaster of Gervais, Ijowever, is an entirely different animal, namely, the 

 Macroxus leucops of Gray, os is shown in the discussion of the synonymy of 

 that species. F. Cuvier's S. leucogaster, the description of which I have not 

 seen, is referred by Boird ond others to Cuvier's 8. aureogaster. 



