348 



REVIEW OF AMERICAN BIRDS, 



[part I. 



ably: from .45-. 75 of an iucb. With the specimens before me I 

 am uuuble to see any essential difference between eastern and 

 western specimens. 



A young bird from Fort Simpson is not materially diffei'cnt from 

 the adult, exhibiting no trace of the spots of immature Turdidae 

 and St/lvicolidse. 



I am now inclined to consider the specimen upon w^hich Vireo 

 cassini was based to be only a dull-plumaged, winter skin of V. 

 solitaria, with the under parts tinged with brownish-buff, and the 

 olive shades obscured. I have never seen a specimen killed in 

 eastern North America having this coloration, nor even making a 

 decided approximation to it, but I can find no tangible characteristic 

 of external form to distinguish them. 



(6,822.) Iris hazel. (10,229.) Type of V. cassini. 



Vireosylvia propjnqua* 



Vireosylvia propinqua, Baird, n. sp. 

 Ilab. Cobcan, Guatemala. 



(No. 20,402.) Top and sides of the head bluish-ash ; a line from bill to eye, 

 eyelids and under parts, including vent and crissum, white. Upper parts 

 olive green, this color extending on the sides of the neck as far as the ear 

 coverts. Throat and breast tinged with yellowish, deepest on the lateral 

 portion. Two white bands on the wing. Bill and legs plumbeous. Quills 

 and rectrices as in solitaria. 



First or spurious primary very small, scarcely .30 of an inch ; 2d quill 

 equal to the 5tli ; the 3d longest. 



(No. 20,402.) Total length, 5.10; wing, 3.00; tail, 2.35; exposed portion 

 of 1st primary, .2'j, of 2d, 2.18, of longest, 3d (measured from exposed base 

 of 1st primary), 2.30 ; length of bill from forehead, .60, from nostril, .31, along 

 gape, .(56 ; tarsus, .72 ; middle toe aud claw, .03 ; hind toe and claw, .47. 



