296 • NORTH AMERICAN BIRDS. 



Synopsis of Species. 



Throat yellow ,'\erie.i 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 po.<;terior edge with pale ashy 

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

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

 or pure yellow; above olive-brown, hke 9, beneath pale ochraceous-bufF. 



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

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

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

 Guatemala .......... var. t r i c li 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. Ilab. Eastern Mexico (Ja- 

 lapa?) ........... var. melanojis .' 



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

 whitisli ; imuli narrower on forehead than on auriculars; maxilla; 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 (Cayc^nnc, Trinidad, etc.) .... var. cequinociialis.' 



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

 Bill, .14 deep ; wing, 2.40 ; tail, 2.50. Hab. Brazil . . var. velata.* 



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

 frontlet. 



3. G. poliocephala. Bill much as in Granatettus. 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) . . . . . . . . . \ar. poli oceph nla ." 



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

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

 leu) • . . . . ■ • • • ■ var. caninuc ha.° 



Series II. 



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

 similar. 



1 Geothhjpis rostratus, Bryant, Pr. Host. Soc. N. H. March, 1867, 67, Inagua. 



2 Gcothbjpis mdanops, lUian, Review Am. Birds, I, April, 1865, p. 222. 



^ Geothlypis cequinoctialis (CAKAtiiii), Baikd, Rev. I, p. 224. {Molacilla ccq. Gmjelin', S. N. 

 I, 1788, 972.) 



■* Geolhli/pi.i vclata (Cabaxis), BAll'.n, Rev. I, 223. (Sylvia vd. Vieill. Ois. Am. Sejit. II, 

 1807, 22, pi. Ixxiv.) 



' Geotlihipis }yolioccp1uila, Baird, Review Am. Birds, I, April, 1865, p. 225. 



° Geothhjpis jMlioccphala, var. caninuclm, Ridgway. 



The G. spcciosa, Sol. (P. Z. 1858, 447 ; and Baird, Rev. 1864, p. 223), from Mexico, and 

 G. semijlamis, ScL. (P. Z. S. 1860, 273, 291. — Baird, Rev. I, 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, tliat they are distinct. 



