ALLEN ON THE AMERICAN SCIUEL 885 



CBstuans var. rufo-niger, Allen), with the remark, "By some curious 

 error Gray's account of this last {Macroxus xantliotus) has been printed 

 after that of M. hrunneo-niger, instead of after M. griseogena; so that 

 the remark, 'very like the former', etc., naturally led Mr. Allen to refer 

 the synonym to S. gerrardi " {I. c. p. 667). 



XII.— SciURUs DEPPEi, Peters. 



Sciurus deppei, Peteks, Monatsb, K.-P. Ak. Wissen. Berlin, 1863, (1864), 654 (formerly 



referred by me, with a ?, to S. carolinensis'). 

 Macroxus tephrogaster, Gkay, Ann. and Mag. Nat. Hist. 3d ser. xx, 1867, 408. 

 Macroxus middellinensis, Gray, Ann. and Mag. Nat. Hist. 3d ser. sx, 1867, 408. 

 Macroxus tceniurus, Gray, Ann. and Mag. Nat. Hist. 3d ser. xx, 1867, 431. 

 Sciurus tephrogaster, Allen, Mon. N. Am. Eod. 1877, 763 (excluding " ?Maa-oxu8 Jraseri, 



Gray"). 



Note. — The examination of the type of S. deppei, Peters, by Mr. 

 Alston, shows it to be identical with Gray's M. tephrogaster, over which 

 it has three years' priority. "As already observed," says Mr. Alston, 

 ^'■M. fraseri, Gray, was so insufficiently described that Mr. Allen was led 

 to identify it with the present species, which is about half its size and 

 totally different in coloration" (Z. c. p. 669). 



XIII. — SCIURTJS -ZESTUANS, Linn6. 



Sciurus cestuans, LiNNii, Syst. Nat. i, 1766, 88. 



Sciurus cestuans var. guanensis Peters, Monatsb. K.-P. Akad. Wissens. Berlin, 1863, 



(1864), 655. 

 Myoxus guerlingus, Shaw, Gen. Zool. ii, 1801, 171, pi. clvi. 

 Sciurus gilvigularis, "Natterer'', Wagner, Wiegm. Arch, fiir Naturg. 1843, ii, 43; ii. 



1845, i, 148. 

 Macroxus leucogaster, Gray, Ann. and Mag. Nat. Hist. 3d ser. xx, 1867, 430. 

 Macroxus irroratus, Gray, Ann. and Mag. Nat. Hist. 3d ser. xx, 1867, 431. 

 Macroxus Jlaviventer, " Castelnau ", Gray, Ann. and Mag. Nat. Hist. 3d ser. xx, 1867, 432. 

 Sciurus asstuans var. cestuans, Allen, Mon. N. A.m. Rod. 1877, 756 (exclusive of ^'?S. 



pusillus, Geoffroy ", and "M. kuhli, Gray ", and inclusive of ^'M. irroratus, Gray ", 



referred to var. rufoniger). 



Note. — "ilf. irroratus must also be placed here, although the original 

 description is such that Mr. Allen unhesitatingly referred it to the last 

 species [S. griseogenysy — Alston, I. c. p. 668. 



XIV. — Sciurus hoffmanni, Peters. 



Sciurus cestuans var. hoffmanni, Peters, Monatsb. K.-P. Ak. Wiss. Berlin, 1863, (1864), 654. 



Sciurus liyporrliodus, Gray, Ann. and Mag. Nat. Hist. 3d ser. xx, 1867, 419. 



Macroxus xantliotus, Gray, Ann. and Mag. Nat. Hist. 3d ser. xx, 1867, 429. 



Macroxus griseogena, Gray, Ann. and Mag. Nat. Hist. 3d ser. xx, 1867, 429. 



Sciurus griseogengs, Alston, Proc. Zool.Soc. Lond, 1878,667. 



Sciurus cestuans var. riifoniger, Ai.len, Mon. N. Am. Rod. 1877, 757 (excluding S. rufoniger 



and S. chrysosurus, Pucheran, and adding M. xantliotus, Gray, formerly referred 



to S. gerrardi). 



Note.— "Mr. Allen, in his monograph, regards this Squirrel as a 

 ^ variety ' or geographical race of the next species [i. e. S. wstuans], 



