PASSERESVIREONIDAE VIREO GILVUS VAR. SWA1NSONI. 221 



FAM. VIREONIDAE: VIREOS. 



VIREO GILVUS (Vieill.), var. SWAINSONI, Btl. 

 Western Warbling "Vireo. 



Vireo swaimonil, BD., Birds X. A., 1858, 336 (in text; Pacific coast). COTJES, Ibis, 



1805, 104 (Arizona). Id, Proc. Acad. Nat. Sci. Pbila., 1800, 73 (Arizona). 

 Vireosylma swainsonii, BD., Rev. Am. Birds, i, 1806, 343. STEV., U. S. Geol. Surv. 



Terr., 1870, 404 (Wyoming). AIKEN, Proc. Bost, Soc. Nat. Hist., 1872, 193 



(Colorado). 



Vireosylvia yilva var. swainsoni, COOPER, Birds Cal., i, 1870, 110. 

 Vireo ffilvvs var. swainsoni. COUES, Key N. A. Birds, 1872, 121, f. 04. BD., BRKW., 



& RIDG., N. A. Birds, i, 1874, 371. YARROW & HENSHAW, Rep. Orn. 



Specs., 1872, Wheeler's Exped., 1874, 12. HENSIIAW, Rep. Orri. Specs., 



1873, Wheeler's Exped., 1874, 77, 105. Id., An. Lye. Nat. Hist. N. Y., xi, 



1874, 4. Id, An. List Birds Utah, 1872, Wheeler's Exped., 1874, 43. Couts, 

 Birds Northwest, 1874, 98. 



Vireo gilvus, Coop. & SUCKL., Nat. Hist. Wash. Terr., 1859, 188. XANTUS, Proc. Acad. 

 Nat. Sci. Phila., 1859, 191 (Fort Tejon, Cal.). HEERM., P. R, R. Rep., x, 

 pt. iv, 1S59, 55. HENRY, Proc. Acad. Nat. Sci. Phila., 1859, 106 (New 

 Mexico). COOPER, Am. Nat., iii, 1809,35. ALLEN, Bull. Mus. Com p. Zool., 

 iii, 1872, 150, 170 (Kansas; Colorado; Utah), (includes both varieties). 



This vireo is the most abundant and widely distributed of its tribe 

 throughout the Middle Region, and has been met with in every section 

 through which the expedition has passed. In Utah, it is abundant ; and 

 here it often finds its home in the gardens and streets of the towns, thus 

 exhibiting the same traits of confiding familiarity which attach to it in the 

 East. It is, however, equally numerous in the wild uncultivated districts 

 where man has not yet penetrated. It frequents, for the most part, the 

 deciduous trees, especially the cottonwoods, and ranges from the valleys 

 high up into the mountains, and the species is almost as strongly represented 

 numerically at 10,000 feet as at a lower altitude. Its habits are every- 

 where the same, and the sweet, half meditative notes of its beautiful song 



