660 MR. E. R. ALSTON ON NEOTROPICAL SQ.UIRRELS. [June 18, 



III. SciURUS GRISEOFLAVUS. 



*Macroxus griseoflavus, Gray, Ann. & Mag. Nat. Hist. 3rd series, 

 xx. p. 427 (1867). 



(Sciurus leucops, Allen, Hon. N.-Am. Rodent, p. 753, nee 

 Gray.) 



Length (in skin) about 13'50 inches, of tail-vertebrae 1 - 25 inches. 

 Upper parts nearly uniform yellowish grey, the narrow black rings 

 and minute whitish tips of the hairs merely obscuring the general 

 tint produced by their broad pale-brown median bands ; lower parts 

 yellowish red, the hairs in one specimen obscurely ringed with black. 

 Tail bushy, strongly washed with white ; the hairs yellowish or pale 

 brown, with two or three narrow and one broader black band suc- 

 ceeded by a long white tip. 



Hah. Mexico (?) ; Guatemala. 



Mr. Allen considers Gray's M. griseqftavus to be specifically 

 identical with his M. leucops {op. cit. p. 753) ; and the original 

 diagnosis certainly seems to give countenance to such a view. The 

 typical specimens (five in number), however, are very different, and 

 in my opinion are closely allied to the last species, of which I 

 suspect it will eventually prove to be a southern race. More speci- 

 mens, however, are required before they can be united ; and provi- 

 sionally I therefore accept 5 1 . griseoflavus as a distinct species. 



It* appears probable that this is Mr. Tomes's S. ludovicianus 

 from Guatemala 1 ; and a Mexican specimen in the Copenhagen 

 Museum, labelled " Sc. affinis, an sp. nov. ? Reinh.," does not 

 appear to be separable. 



IV. Sciurus variegatus. 



Sciurus variegatus, Erxleben, Syst. Reg. An. p. 421 (1777, ex 

 Hernandez). 



*Sciurus aureogaster, F. Cuvier, Hist, des Mamm. iii., livr. lix. 

 (1829). 



Sciurus leucogaster, F. Cuvier, Suppl. de Buff. i. Mamm. p. 300 

 (1831). 



Sciurus aluipes, Wagner, Abh. Bayer. Ak. ii. p. 101 (1837). 



Sciurus ferruginiventris, Audubon & Bachman, P. Ac. Philad. 

 1841, p. 101. 



Sciurus varius, Wagner, Suppl. Schreber Siiugeth. iii. p. 168 

 (1843). 



Sciurus socialis, Wagner, torn. cit. p. 170. 



*Macroxus morio, Gray, Ann. & Mag. Nat. Hist. 3rd series, xx. 

 p. 424 (1867, nee Wagner). 



*Macroxus maurus, Gray, torn. cit. p. 425. 



*Macroxus leucops, Gray, torn. cit. p. 427. 



{Sciurus aureigaster et S. leucops, Allen, Mon. N.-Am. Rodent, 

 pp. 750, 753.) 



Hah. Southern Mexico; Guatemala? 



Average length about 10'50 inches, of tail-vertebrae 8 - 75 inches. 



1 Proc. Zool. Soc. 1861, p. 281. 



