PASSERESVIREONIDAE VIREO VICINIOR. 



227 



which, in so many well known instances, accompany the change of habitat 

 when the species extends from the east to the west. In this instance, the 

 divergent features between the two extremes or typical forms are paralleled 

 in the cases of Vireo gilvus var. swainsoni and V. solitarius var. plmibeus 



as- distinguished from the eastern forms. 



VIREO VICINIOR, Coues. 



Arizona Vireo. 



Vireo vieinior, COUES, Proc. Acad. Nat. Sci. PLila., 18GC, 75 (Forfc Whipple, Ariz ; one 

 specimen). BD., Rev. Am. Birds, 18CG, 361. COOPER, Birds Cal., 1870, 

 125. COUES, Key N. A. Birds, 1872, 122. BD., BREW., & RIDG., N. A. 

 Birds, i, 1874, 393, pi. xvii, f. 7. 



This Vireo was discovered by Dr. Coues at Prescott, Ariz., and 

 described in 1866, since which time the type of the species has remained 

 unique till the rediscovery of the species during the past season in New 

 Mexico and Arizona. Judging from the wide separation of the several 

 localities at which the six specimens were taken, it appears to be a widely 

 distributed species, though everywhere rare. It would appear not to be a 

 bird of the mountains, but, in respect to elevation, to occupy a position 

 somewhat intermediate between the higher districts and the low valleys. 

 The rocky hills, covered with a scanty growth of bushes and scrub, are 

 its favorite haunts, and it was in such localities that all our specimens were 

 obtained. They are not especially active in their motions, but glean their 

 insect food from among the branches with the same deliberation of move- 

 ment and ease that mark the habits of the vireos generally; but in their 

 choice of hunting ground they are rather peculiar. They do not, like the 

 Solitary Vireo and its allies, frequent the tops of the larger trees, nor, like 

 the White -eyed and Bell's Vireo, keep close to the ground, but move about 



