880 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



f Sciurus Injemalis, Okd, " Guthrie's Geog. (2d Am. ed.) ii, 1815, 293, 304." 

 ?? Macroxus neglectus, Gray, Add. and Mag. Nat. Hist. 3d ser. xx, 1867, 425 (locality 

 unknown). 



3. — Var. ludovicianus. 



Sciurus ludovicianus, CUSTIS, Barton's Med. and Phys. Journ. ii, 1806, 43. 



Sciurus ludovicianus var. airoveniris, Engelmann, Trans. Acad. Sci. St. Louis, i, 1859, 329. 



Sciurus macroura, Say, Long's Exp. E. Mts. i, 1823, 115. 



Sciurus macr aureus, Godman, Am. Nat. Hist, ii, 1826, 134. 



Sciurus magnicaudatus, Harlan, Faun. Am. 1825, 178. 



Sciurus subauratus, Bachman, Proc. Zool. Soc. Lond. 1838, 87. 



Sciurus auduboni, Bachman, Proc. Zool. Soc. Lond. 1838, 97. 



Sciurus occidentalis, Audubon & Bachman, Journ. Acad. Nat. Sci. Phila. viii, 1842, 317. 



Sciurus ruMcaudatus, Audubon & Bachman, Quad. N. Am. ii, 1851, 30, pi. Iv. 



Sciurus sayi, Audubon & Bachman, Quad. N. Am. ii, 1851, 274, pi. Ixxxix. 



Sciurus limiiis, Baird, Proc. Acad. Nat. Sci. Phila. vii, 1855, 331. 



Note. — Under Var. ludovicianus, Mon. N. Am. Eod. p. 718, exclude 

 '"? Tomes, Proc. Zool. Soc. Lond. 1861,281 (Costa Eica [Ze^^e Guatemala])". 



IV. — Sciurus fossor, Peale. 



Sciurus fossor, Peale, Mam. and Birds U. S. Expl. Exp. 1848, 55. 

 Sciurus heermanni, LeConte, Proc. Acad. Nat. Sci. Phila. vi, 1852, 149. 



V. — Sciurus aberti, Woodh. 



Sciurus dorsalis, Woodhouse, Proc. Acad. Nat. Sci. Phila. vi, 1852, 110 (jiec Gray, 1848). 

 Sciurus aberti, Woodhouse, Proc. Acad. Nat. Sci. Phila. vi, 1852, 220. 

 Sciui'us castanotus, Baird, Proc. Acad. Nat. Sci. Phila. vii, 1855, 332 (typ. error for cas- 

 tanonotus). 



VI. — Sciurus arizonensis, Coues. 



Sciurus arizonensis, Coues, Amer. Nat. i, 1867, 357. 



Sciurus colliwi, Allen, Mon. N. Am. Rod. 1877, 738 (exclusive of synonyms, which all 



helong to the next species, except " ? S. hporinus, AlJD. & Bach.", which is 



indeterminable). 



Note. — "Misled by imperfect descriptions and a bad figure of Rich- 

 ardson's type, Mr. Allen has referred the Arizona Squirrel of Dr. Coues 

 to Eichardson's ;S^. collicei. He has siuce kindly intrusted me with a 

 typical example of S. arizonensis ; and I find that it is quite distinct 

 from 8. GollicBi (which is Mr. Allen's 8. hootJiice), being much more nearly 

 allied to 8. carolinensis, from which, however, both Dr. Coues and Mr. 

 Allen consider that it is ' thoroughly distinct'." — Alston, I. c. p. 659. 



B.— SPECIES OF MEXICO AND CENTRAL AND SOUTH 



AMERICA. 



VII.— Sciurus griseoflavus, (Gray) Alston. 



Macroxus griseoflavus, Gray, Ann. and Mag. Nat. Hist. 3d ser. xx, 1877, 427. 

 Sciurus griseoflavus, Alston, Proc. Zoiil. Soc. Lond. 1878, 660. 



? Sciurus ludovicianus. Tomes, Proc. Zoiil. Soc. Lond. 1861, 281 (according to Alston, 

 I. c. p. 660). 



Note. — Referred by me to my 8. Jeucops. Considered by Mr. Alston 

 to be "closely allied" to >S^. arizonensis, of which he suspects "it will 



