662 MR. E. R. ALSTON ON NEOTROPICAL SQUIRRELS. [June 18, 



present species 1 . By retaining this appropriate name, we are enabled 

 to escape from F. Cuvier's barbarous term aureogaster, under which 

 this beautiful animal has laboured in so many works. S. albipes, 

 Wagner, afterwards re-named S. varius by its describer, is doubt- 

 fully referred to the next species by Mr. Allen ; but the description, 

 especially the character of the hairs being ringed with red, black, 

 and white, appears to point certainly to identity with Gray's S. leucops. 

 Wagner's S. socialis also, founded on a single example, seems also to 

 be a synonym of the present species ; for the characters of coloration 

 by which he differentiates it from his S. varius are quite insufficient, 

 and the small size may, as Mr. Allen suggests, be due to the imma- 

 turity of the specimen described. 



V. SCIURUS HYPOPYRRHUS. 



Sciurus hypopyrrhus, Wagler, Isis, 1831, p. 610. 



*Sciurus nigrescens, Bennett, P. Z. S. 1833, p. 41. 



*Sciurus coliicei, ltiehardson, Zool. Voy. ' Blossom,' p. 8, pi. i. 

 (1839). 



*Sciurus variegatoides, Ogilby, P. Z. S. 1839, p. 117- 



*Sciurus richardsoni, Gray, Ann. Nat. Hist. x. p. 265 (1842, nee 

 Bachman). 



* Sciurus boothice, Gray, List Mamm. Brit. Mus. p. 139 (1843). 



*Sciurus griseocaudatus, Gray, Zool. Voy. ' Sulphur,' p. 34, 

 pi. xiii. (1844). 



*Sciurus fuscovariegatus, Schiutz, Syn. Mamm. ii. p. 1/ (1845, 

 ex Gray). 



*JKacroxus adolphei, Lesson, Desc. de Mamm. &c. p. 141 (1847). 



*Macroocus pyladei, Lesson, tom.cit. p. 142. 



*Sciurus dorsalis, Gray, P. Z. S. 1848, p. 138, pi. vii. 



*Sciurus rigidus, Peters, Monatsb. Ak. Berl. 1863, p. 652. 



*Sciurus oculatus, Peters, torn. cit. p. 653. 



*Sciurus intermedins, Verreaux, ap. Gray, Ann. & Mag. Nat. 

 Hist. ser. 3, xx. p. 421 (1867). 



*Macrouus nicoyana, Gray, torn. cit. p. 423. 



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



(Sciurus boothice et 5. hypopyrrhus, Allen, Mou. N.-Am. Rodent. 

 pp. 741, 746.) 



Hab. Central America, from the Pacific coast of Mexico to the 

 Isthmus of Panama. 



Average length about 1T75 inches, of tail-vertebrae 10 inches. 

 Pelage close-lying and rather glossy, with little underfur. Upper 

 parts dark brown or black, often broadly ringed with rufous or white. 

 Lower parts varying from deep red to creamy white, sometimes 

 ringed with black. Tail black, generally washed with white, the 

 hair rufous, pale brown or whitish at their base, with one or two 

 black or brown rings and a white tip. 



In uniting all the very variously marked Squirrels the names of which 



1 "8. corpore supra nigro, albo et fusco variegato. * * * Magnitude) dupla 

 S. vulgaris. Auriculas iinberbes. Corpus supra nigro, albo et fusco variegatum, 

 ventre flavescente. Cauda supra corpus reflexa." 



