T14 MONOGRAPHS OF NORTH AMERICAN RODENTIA. 
“Les parties inférieures du corps et les parties internes des membres, 
ainsi que le tour de la bouche, sont d’un gris clair lég¢rement teinté de jaune. 
Les poils des cdtés du ventre ont les deux mémes 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, présentent aussi les deux mémes couleurs; 
mais avec cette différence que le blanc ou le fauve occupe la plus grande partie 
de leur étendus. 
“La queue, ronde et non distique, est, sauf sa base dont la couleur a &é 
plus haut indiquée, d’un gris blanchatre, les poils étant noirs dans leur pre- 
miére portion, puis blanc vers leur extrémité. De plus, parmi eux, sont 
entremélés quelques poils entitrement blancs.” 
In comparing this species with his S. “awreogaster” (=/eucops, nec aureo- 
gastey ¥’. 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 pimip1atus Waterh. 
Sciurus dimidiatus WATERHOUSE, Proc. Zool. Soc. 1840, 21. 
Macroxus dimidiatus Gray, Ann. and Mag. Nat. Hist. 3d ser. xx, 1867, 434. 
This species, described originally by Waterhouse as probably South 
American, IT am unable to identify with any American species. It is thus far 
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 dimidiatus. Sci. suprd griseus fulvo lavatus, subtus. flavus ; 
capite, corpore ad latera pedibusque rufuscentibus ; cauda feré corporis longi- 
tudinem equante, indut& pilis nigris, flavis atque fulvis commixtis. 
une. lin. 
“Longitudo ab apice rostri ad cauds basin -...-.....-------2- «--- eee --ce caitdnassess cosdiss 10 0 
ae CURR), Ferd... 0 oes occeess sede cae Noe e See ee ee 
a ab apice rostri ad basin auris..._-.. foc eSe ct he cen cae eeee cas hate sceete co eeieeen rhe uptll! 
i ————_— LOTS AtgtlOrUum Que cans wale Soe ene See eee ee ee 2 as 
ss QUIRES oo -\ wave jn eee ae Seas Scere eee ae ee en ae a nef) 
“Hab. South America ? 
“This curiously-colored species of Squirrel was purchased at a sale, and 
