296 NORTH AMERICAN BIRDS. 



Synopsis of Species. 



Throat yellow Series I. 



Throat ash Series II. 



Series I. 



A. Black mask extending beneath the eye and on the auriculars. 



1. G. trichas. Black mask bordered along its posterior edge with pale ashy 

 or whitish : maxillae black. Sexes dissimilar. 9 • Olive-brown above ; 

 throat only, distinctly yellow ; no black mask. Juv. Without either black 

 or pure yellow ; above olive-brown, like 9 ; beneath pale ochraceous-buff. 



Abdomen almost always whitish ; occiput russet-olive. Bill, from 

 nostril, ..30; tarsus, -70; wing, 2.25; tail, 2.15. Hab. "Whole of United 

 States ; in winter most of West Indies, and Middle America, north to 

 Guatemala var. t r i c h a s . 



Colors similar ; abdomen yellow. Bill, .45 ; tarsus, .90 ; wing, 2.50 ; 

 tail, 2.50. Hab. Nassau; New Providence ; Bahamas . var. rostrata} 



Abdomen bright yellow ; occiput whitish-ash tinged with yellow. Bill, 

 .32 ; tarsus, .75 ; wing, 2.45 ; tail, 2.50. Hah. Eastern Mexico (Ja- 

 lapa?) ........... var. melanops !'■ 



2. G. aequinoctialis. Black mask not bordered posteriorly by ashy or 

 whitish ; much narrower on forehead than on auriculars ; maxillie yellow. 

 Sexes similar. 



Black of the auriculars bordered posteriorly by the olive-green of the 

 neck. Bill, .17 deep; wing, 2.50 ; tail, 2.35. Hab. Northeast South 

 America (Cayenne, Trinidad, etc.) .... var. cequino ctiali s .^ 



Black of the auriculars bordered posteriorly by the ash of the crown. 

 Bill, .14 deep ; wing, 2.40 ; tail, 2.50. Hab. Brazil . . var. v el at a.* 



B. Black mask not extending underneath the eye, but confined to lores and 

 frontlet. 



3. G. poliocephala. Bill nmch as in Granatellus. Above olive-green ; the 

 crown light ash ; beneath yellow. Sexes dissimilar. 



Eyelids white; nape and auriculars olive-green; abdomen whitish. 

 Bill, .30, .15 deep ; wing, .2.20 ; tail, 2.50. Hab. West Mexico (Ma- 

 zatlan) \av. poli oceph ala .'• 



Eyehds black; nape and auriculars ashy; abdomen wholly yellow. 

 Bill, .35, .18 deep; wing, 2.40; tail, 2.50. Hab. Guatemala (Retalu- 

 \q^\ ......■■•• var. caninucha.^ 



Series II. 



4. G. Philadelphia. Head all round ashy ; lores only, black. Sexes nearly 

 similar. 



1 Geothlypis rostratus, Bryant, Pr. Bost. Soc. N. H. March, 1867, 67, Inagua. 



2 GcotUhjins melanops, Baird, Review Am. Birds, I, April, 1865, p. 222. 



3 Geothlypis Kquinoctialis (Cabanis), Baird, Rev. 1, p. 224. {MotaciUa ax[. Gmelin, S. N. 

 I, 1788, 972.) 



* Geothlypis velata (Cabanis), Baird, Rev. I, 223. {Sylvia vel. Vieill. Ois. Am. Sept. II, 

 1807, 22, pi. Ixxiv.) 



s Geothlypis poliocephala, Baird, Review Am. Birds, I, April, 1865, p. 225. 



6 Geothlypis poliocephala, var. caninucha, Ridgway. 



The G. speciosa, ScL. (P. Z. 1858, 447 ; and Baird, Rev. 1864, p. 223), from Mexico, aiul 

 G. semiflavus, ScL. (P. Z. S. 1860, 273, 291. — Baird, Rev. 1, 1864, 223), from Ecuador, are. 

 species allied to G. trichas, and possibly referable to it. The original descriptions afford no 

 tangible distinctive characters. It is barely possible, however, that they are distinct. 



