i 



. 



!!l' 



SiJ 



II ' 



774 MON'OUUAPUS OV NORTU AMBBIOAN RODBNTIA. 



"Les parties infdrieures dii corps et les parties internes des membres, 

 ainsi que le tour de la bouche, sont d'un gris clair It^gferemcnt teintd de jaune. 

 Les poils des cotes du ventre ont les deirx uiemes couleurs que les poils du 

 dos, mais sont beaucoup plus courts. Les poils plus courts qui couvrent le 

 milieu du ventre et de la poitrine, prdsentent aussi les deux m6mes couleurs; 

 mais avec cette difftirence que le bianc ou le fuuve occupe la plus grande partie 

 de leur 4tendus. 



"La queue, ronde et non distique, est, sauf sa base dont la couleurli ^t^ 

 plus haut indiqude, d'un gris blanch^tre, les poils dtant noirs dans leur pre- 

 miere portion, puis blanc vers leur extrt^mitd De plus, parmi eux, sont 

 entrem^lds quelques poils enti^rement Wanes." 



In comparing this species with his 8. " aureogaster" (: leucops, nee aureo- 

 gaster F. Cuv.), described and figured in the same work, he dwells particularly 

 upon the differences in dentition that exist between them, not only in respect 

 to the form of the teeth, but in respect to the presence in S. nebouxi of only 

 a single upper premolar instead of two. 



This species, here given provisionally, seems quite different from any 

 other hitherto described ; it may, however, be merely a gray phase of some 

 other well-known species, possibly of Sciurus hypopyrrhus. 



2. — Sciurus dimidiatus Waterh. 



BeiuTut dmi'liatut Waterhousb, Proc. Zoiil. Soc. lf^40, 21. 



Macroxua dimidiatus Okay, Aun. nud Mag. Nat. HiHt. 3d ser. xx, 1S67, 434. 



This species, described originally by Wuterhouse as probably South 

 American, I am unable to identify with any American species. It is thus fiir 

 known only from Waterhouse's original specimen from an unknown locality. 

 As Dr. Gray has suggested, it is more likely of African origin. Mr. Water- 

 house's description is as follows: — 



"Sciurus ditnidiatus. Sci. supri griseus fulvo lavatus, subtus flavus; 

 capite, corpore ad latera pedibusque rufuscentibus ; cauda fer^ corporis longi- 

 tudinem sequante, indutil pilis nigris, flavis at<}ue fulvis commixtis. 



nno. Ha. 



"Longitndo ab apioe ro8tri ad caudie biuin 10 



" caudae, feik 7 6 



" abapice rostriBd basin anris 1 11 



" tani digitonmque 2 3 



" Burin 8 



,1, *^Hab. South America! 



' '' "Th.b curiously-colored species of Squirrel was purchased at a sale, and 



