RODENTIA-SCIURINAE—SCIURUS LUDOVICIANUS. 
251 
SCIURUS LUDOVICIANUS, Custis. 
Western Fox Squirrel. 
RED VARIETY. 
Sciurus ludovicianus, Peter Custis, Barton’s Medical and Physical Journal, II, 11 , 1806, 43. (Red river of Louisiana.) 
Harlan, Fauna Americana, 1825, 186. 
Griffith’s Cuv. V, 1827, 254. 
Fischer, Synopsis, 1829, 351. 
Sciurus rnfiventer , (“ Geoff. Mus. Par.”) Desmarest, Mammal. II, 1822, 332. (New Orleans.) 
“ Geoffroy, Nouv. Diet. d’Hist. Nat. X, 103.” 
Harlan, Fauna Americana, 1825, 176. 
Fischer; Synopsis Mammalium, 1829, 351. 
Schinz, Synopsis Mamm. II, 1845-6. (Original description from a large Missouri specimen.) 
Sciurus macroura, Say, Long’s Exped. R. Mts. I, 1823, 115. (Above mouth of Kansas river.) 
Sciurut macrourus, Doughty, Cab. N. H. I, 1830, 265; pi. xxiii. 
F. Cuv. Suppl. BufFon, I, Mam. 1831, 297. 
Sciurus macroureus, Godman, Am. N. H. II, 1826, 134. 
Sciurus magnicaudatus, Harlan, F. Am. 1825, 178. 
Griffith’s Cuv. V, 1827, 255. 
Fischer, Synopsis, 1829, 351. 
Bachman, Pr. Zool. Soc. Lond. VI, Aug. 1838, 88.— Ib. Charlesw. Mag. N. H. Ill, April, 
1838, 156.— Ib. Sill. Am. Jour. Sc. XXXVII, 1839, 296. 
Wagner, Suppl. Schreb. Ill, 1843, 166. 
Schinz, Synqp. Mamm. II, 1845, 11. 
Kennicott, Mamm. Illinois, IT. S. Pat. Report, 1856, Agricultural. (1857,) 56; pi. vi. (Wood- 
cut. Original figure from-life.) 
Sciurus sayi, Aud. & Bach. N. Am. Quad. II, 1851, 274; pi. Ixxxix. (Missouri squirrel.) 
Sciurus subauratus, Bachman, Pr. Zool. Soc. Lond. VI, 1838, 87.— Ib. Charles. Mag. N. H. Ill, 1839, 155.— Ib. Am. 
Jour. Sc. XXXVII, 1839, 295. 
Wagner, Suppl. Schreber, III, 1843, 164. 
Aud. & Bach. N. Am. Quad. II, 1851, 67; pi. lviii. (New Orleans and Louisiana.) 
Sciurus rubicaudatus, Aud. & Bach. N. A. Quad. II, 1851, 30; pi. lv. (Illinois and Kentucky.) 
?? Sciurus limitis, Baird, Pr. A. N. Sc. Phil. VII, April, 1855, 331. (Devil’s river, Texas.) 
?? Sciurus lewisii, Ham. Smith, Griffiths’ Cuv. Ill, 1827, 190; plate. 
Wagner, Suppl. Schreb. Ill, 1843, 182. 
Schinz, Syn. Mamm. II, 1845, 13. (From specimen in Paris Museum.) 
DUSKY VARIETY. 
Sciurus auduboni, Bachman, Pr. Zool. Soc. Lond. VI, 1838, 97 .—Ib. Charlesworth’s Mag. N. H. Ill, 1839, 378. 
Wagner, Suppl. Schreb. Ill, 1843, 175. 
Aud. & Bach. N. Am. Quad. Ill, 1854, 260; pi. clii, fig. 2. 
? Sciurus occidentalis, Aud. & Bach. J. A. N. Sc. Phil. VIII, n, 1842, 317. 
Sr. Ch. —Tail, with the hairs, but little longer than the head and body. Head rather slender, with somewhat acute muzzle. 
Ears rather narrow and high, not tufled on the back. Tail broad and full. Length about 11 or 12 inches; tail but little longer. 
Hind foot usually not exceeding 2.80 inches; skull, 2.60. Varies in being smaller in the south. 
Color usually grizzled rusty gray above; beneath, body and tail bright ferruginous. Belly sometimes black. Sometimes dusky 
all over, with the belly chocolate brown annulated. No pure black nor white bellied varieties seen. Nose and ears never white. 
This species is among the most variable in color, as well as size, of all the American squirrels, 
these peculiarities, as might have been expected, having given rise to a great many synonymes. 
As in some other species the more northern specimens are the larger, and the fox color varies 
from pale yellowish rusty to rather deep ferruginous; sometimes again, the animal is dusky 
