THE NATURAL HISTORY SURVEY. 153 



The range of the Red-eyed Yireo lies chiefly east of Colorado 

 and British Columbia, and from the Arctic regions southward 

 It breeds nearly throughout its North American range and win- 

 ters south to Florida. 



Vireosylva philadelphica Cassin. Philadelphia Vireo. 



Vireosylvia philadelphica CASSIN, Proc. Acad. Nat. Sci. Philadelphia, 



V, Feb. 1851, 153, pi. 10, fig. 2. 



Vireo philadelphicus BAIBD, Rep. Pacific R. R. Surv., IX, 1858, 335. 

 Popular synonyms: PHILADELPHIA GBEENLET. BEOTHEELY-LOVE 



VIBEO. 



This Vireo is a rare migrant, arriving in the spring about the 

 middle of May, and returning in the fall from the last of August 

 to the last of September. In 1876, Mr. E. W. Nelson* con- 

 sidered it to be a common migrant, and says: "They were so 

 numerous near Waukegan about the twentieth of May 1876, 

 that a dozen specimens might have been obtained in an hour." 



The range of this species lies in the eastern United States, 

 chiefly west of the Alleghanies, and from the Fur Countries 

 southward to Costa Rica and Panama though it has not been 

 recorded from Mexico or the West Indies. It breeds chiefly 

 north of the United States. There are indications that is may 

 breed in the vicinity of Chicago. Mr. E. W. Nelson says : "The 

 first of July, 1874, I found two pairs of these birds in a dense 

 willow thicket bordering Mazon Creek, about sixty miles south 

 of Chicago. Upon my approach the birds showed great anxiety, 

 uttering a short complaining cry, and coming within a few feet 

 of me. That they had young in the vicinity I was sure, but owing 

 to the character of the covert they were not found." There is 

 evidence that it also breeds in Indiana, for it is known to be a 

 rare summer resident in that state, specimens having been taken 

 during the months of June and July. Professor B. W. Evermann 

 says that it is a rare summer resident in both Carroll and Mon- 

 roe Counties, Indiana. 



Vireosylva gilva (Vieillot.). Warbling Vireo. 



Muscicapa gilva VIEILLOT, Ois. Amer. Sept.. I, 1807, 65, pi. 34. 



Vireo gilvus BONAPARTE, Journ. Acad. Nat. Sci. Philadelphia, IV, 



1824. 176. 

 Popular synonym : WABBLING GBEENLET. 



The Warbling Vireo was formerly a common, but it is now 

 a rare summer resident, and is more common during its migra- 

 tions. It arrives early in May and departs about the middle of 



*Birds of Northeastern Illinois, Bull, of the Essex Institute, Vol. VIII, 1876, 102. 



