340 



EEVIEW OP AMERICAN BIRDS. 



[part I. 



the dusky edges of the cap, and the dark loral line, relieved against 

 a whitish superciliary stripe, so distinct in olivacea and ayiiis, being 

 scarcely or much less appreciable in fiavoviridis. The wings are 

 more rounded in agilis; the first quill considerably shorter than 

 fifth, instead of being nearly equal or longer. 



This species, whether what I describe as V. chivi be the same or 

 not, scarcely extends north of Continental South America — the skin 

 from Guatemala, just mentioned, being almost the only one quoted, 

 and the locality of this may possibly be erroneous, even if the bird be 

 not of a different species. I have never found any indication of the 

 occurrence of any bird of this type in the West Indies or North 

 America in recent times.^ 



It is quite probable that the careful comparison of a larger number 

 of good specimens of Vireos of the type of chivi and agilis may re- 

 sult in establishing the existence of one or two more species ; that 

 from " Guatemala" (No. 8,050), at least, is different in several points 

 from the rest, and I had provisionally named it before concluding 

 that it was best to allow the decision of the question to rest upon 

 the examination of a better series. 



S,O.JO.) "Perhaps erroneous locality." 



Tireosylvia philadelphica. 



Vireosylvia philadelphica, Cassix, Pr. A. N. Sc. V, Feb. 1857, 153.— Ib. 

 VI, pi. i, fig. 1 (Philadelphia).— ScLATER & Salvin, Ibis, I, 1859, 



' I have never met with a bird agreeing with the description of Vireo har- 

 tramii, of Audubon. The proportions of the body and the qnills are much as 

 in V. ayiiis. The tail, however, is said to be "wood-brown margined with 

 paler," instead of olivaceous ; and the lower parts "white, the breast tinged 

 with pale yellow, and the throat and sides with gray," instead of being white 

 below; the crissum bright sulphur yellow, the flanks yellowish-olive. The 

 crown (not the nape) is "deep gray, bordered by a line of blackish," which 

 separates it from all known North American specie.s, excepting V. olivaceus 

 and harbatulus, from which the proportions of the quills are entirely different. 



If, therefore, this species be really as described by Audubon, it has been 

 entirely unnoticed since his time, although (Jistinct, and should be carefully 

 sought for by ornithologists in the Eastern United States. 



