880 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



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

 ff Macroxus neglectus, GRAY, Ann. 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. atroventris, ENGELMANN, Trans. Acad. Sci. St. Louis, i, 1859, 329. 



Sciurus macroura, SAY, Long's Exp. R. Mts. i, 1823, 115. 



Sciurus macroureus, GODMAN, Am. Nat. Hist, ii, 1826, 134. 



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



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



Sdurus auduboni, BACHMAN, Proc. Zool. Soc. Lond. 1838, 97. 



Sciurus occidentalism AUDUBON & BACHMAN, Journ. Acad. Nat. Sci. Phila. viii, 1842, 317. 



Sciurus rubicaudatus, AUDUBON & BACHMAN, Quad. N. Am. ii, 1851, 30, pi. Iv. 



Sciurus sayi } AUDUBON & BACHMAN, Quad. N. Am. ii, 1851, 274, pi. Ixxxix. 



Sciurus limitis, BAIRD, Proc. Acad. Nat. Sci. Phila. vii, 1855, 331. 



NOTE. Under Var. ludovicianus, Mon. N. Am. Bod. p. 718, exclude 

 "! TOMES, Proc. Zool. Soc. Lond. 1861,281 (Costa Rica [lege 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. 



Y. SCIUEUS ABERTI, Woodh. 



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

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

 Sciurus 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. 



Scturus collicei, ALLEN, Mon. N. Am. Rod. 1877, 738 (exclusive of synonyms, which all 



belong to the next species, except " f S. Itporinus, AUD. & 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 Richardson's S. collicei. He has since kindly intrusted me with a 

 typical example of 8. arizonensis ; and I find that it is quite distinct 

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

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

 Allen consider that it is i thoroughly distinct 7 ." ALSTON, 1. c. p. 659. 



B. SPECIES OF MEXICO AND CENTRAL AND SOUTH 



AMERICA. 



VII. SCIURUS GRISEOFLAVUS, (Gray) Alston. 



Macroxus griseojlavus, GRAY, Ann. and Mag. Nat. Hist. 3d ser. xx, 1877, 427. 

 Sciurus griseoflavus, ALSTON, Proc. Zool. Soc. Lond. 1878, C60. 



f Sciurus ludom'.ianus, TOMES, Proc. Zool. Soc. Lond. 1861, 281 (according to Alston, 

 1. c. p. 660). 



NOTE. Referred by me to my 8. leucops. Considered by Mr. Alston 

 to be "closely allied" to 8. arizonensis, of which he suspects "it will 



