62 Brewster's Desertions of the First Plumage 



lids conspicuously fulvous-yellow. In one specimen (male, taken August 

 21), the eyelids ate dirty-white. From seven specimens (two females, five 

 males) in my collection shot at Upton, Me., August, 1^74. Irrespective 

 of generic characters, the young of G. Philadelphia in autumn are at once 

 distinguishable from those of Oporornis agilis in corresponding stages, by 

 tin; total absence of ashy on the central regions of throat, jugulum, and 

 breast. So marked is the difference that obtains in this respect that I am 

 easily able to separate the two species, when lying side by side, at a dis- 

 tance of fifteen or twenty feet. 



40. Geothlypis macgillivrayi. 



Youvg autumal plumage : male. Entire upper parts exactly as in G. 

 Philadelphia of corresponding age and sex. (See preceding species.) 

 Sides of head very dark ashy, washed with olive. Eyelids white. Fore- 

 part of the breast light ashy-gray, with a slight superficial wash of olive, 

 shading into buffy-white on the chin. (Again compare with preceding 

 species.) Rest of under parts clear rich yellow, obscured somewhat with 

 greenish-olive on the sides. Upon raising, or even slightly disarranging, 

 the feathers of the throat, broad subterminal bands of black appear on 

 each feather. These bands or blotches, as in the young G. Philadelphia, 

 are concealed by the ashy tips of the overlapping feathers. From a speci- 

 men in my collection shot at Xicasio, CaL, by Mr. C. A. Allen, August 1, 

 1876. 



41. Geothlypis trichas. 



First plumage: male. Remiges, rectrices, etc., as in adult. "Wing- 

 coverts continuously lighl brown. Rest of upper parts, including sides of 

 head, brown, lightest on rump, and slightly tinged with olive on the back. 

 Throat yellowish-olive, deepening to dark clear olive on jugulum, breast, 

 Bides, and anal region. Abdomen dull yellow, with its lateral margins 

 bounded by bands of fulvous-brown. From specimen in my collection 

 shot at Upton, Me., August 2(3, 1874. Two other specimens, taken respec- 

 tively July 2S and August 10, present no appreciable difference from the 

 birds firsl described. 



42. Pyranga rubra. 



Occasional plumage : male. Wings and tail black ; entire plumage of 

 body rich orange, with a greenish tinge on Hanks and anal region. From 

 a specimen in my cabinet, collected by Mr. ('. ,1. Maynard, at Waltham, 

 Mass., May 27, 1869. This remarkable specimen I for a long time con- 

 sidered unique, hut 1 have recently examined another in the possession of 

 Mr. Arthur Smith, of Brookline, which is its precise counterpart, and 

 Mr. Ridgway tells me he has Been still others. This plumage i> not to he 

 confounded with the ordinary immature one of this bird, where the Bcarlet 

 i- -imply of a lighter shade or mixed with patches of yellowish-green. It 

 i- a pronounced uniform coloring, and apparently a completed plumage. 



