256 U. Ss. P. R. R. EXP. AND SURVEYS—ZOOLOGY—GENERAL REPORT. 
SCIURUS LIMITIS, Baird. 
Texas Fox Squirrel. 
Sciurus limitis, Barrp, Pr. A. N. Se. Phila. VII, April, 1855, 331. (Devil’s river, Texas.) 
Length about 10 inches. Hind foot 1.66 inches. Size less than S. carolinensis. Upper molars four. Hairs short and close 
pressed. Ears long, coated with very short hairs. Feet small; soles naked and dark brown. Above, mixed cinnamon. Tail, 
cinnamon beneath ; above and on the sides like the back, with three annulations of black. 
A full description of this squirrel will be found in the report on the zoology of the United 
States and Mexican Boundary Survey. 
Notwithstanding the marked difference in color and size between this species and all the 
other American fox squirrels, I am far from feeling sure now that it is anything but a local 
variety of the common western fox squirrel. Had I deferred characterizing the species until the 
present time I should hardly have ventured upon a new name with a more ample knowledge of 
the North American squirrels than I possessed two years ago. I only retain it now pro- 
visionally, until its real character can be better tested by additional specimens. The locality 
is considerably further west than that of any fox squirrels that have fallen under my notice. 
List of specimens. 
Catalogue | Corresponding Locality. Whence obtained. Nature of Collected by— 
number. No. of skull. specimen. 
Tine | 
351 1265 Devil’s river, Texas-.| Col. J. D. Graham, U. 8. A----- Skine=-2- J: BH. ClarkvSiete==- 
1415 <b}: in| a domsaenseemtes Major W. H. Emory, U. 8. A.-.-|--do.-.-_- Dr. C. B. Kennerly-- 
fy ae Be See Western Texas--.--- Captain J. Pope, U. 8. A-.--.-- 2200 eos eae ee 
SCIURUS CAROLINENSIS, Gm. 
Gray Squirrel and Black Squirrel. 
SMALL SOUTHERN VARIETY. 
Sciurus carolinensis, Gmewin, Syst. Nat. I, 1788, 143. 
Bacuman, Pr. Zool. Soc. Lond. VI, Aug. 1838, 94.—Is. Charlesw. Mag. III, July, 1839, 330.— 
Is. Silliman’s Am. J. Sc. XXXVII, 1839, 304. 
Aun. & Bacu. N. Am. Quad. I, 1849, 55; pl. vii. 
? Sciwrus cinereus, Desm. Mamm. II, 1822, 332. 
Grirr. Cuv. V, 1727, 254. 
Lesser Gray Squirrel, Pennant, Synopsis, 1771, 283 —Is. Hist. Quad. 1781. 
Hudson Squirrel, var. a, Carolina, Pennant, Arctic Zool. I, 1784, 116. 
Ecureuil gris de la Carolina, St. Hiraine & Coy. Hist. Mamm. III. Two plates and text. 
LARGER NORTHERN VARIETY. 
Sciurus cinereus, ScureBER, Sdugt. 1V, 1792, 766; pl. cexiii. (Original and accurate description; the figure from 
Buffon.) 
Haran, Fauna Americana, 1825, 173. 
Fiscner, Synopsis, 1829, 352. 
Tuompson, N. H. Vermont, 1842, 45. 
