476 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



KEY TO TFIE SPECIES OF OKEOTHLYPIS. 



a. Above bluish gray, with a triangular patch of black on back; chin, throat, chest, 

 and upper breast cadmium orange; no white on side of head. (Highlands of 



Costa Rica and Chiriqui. ) Oreothlypis gutturalis (p. 476) 



aa. Above olive-green, with pileum, hindneck, wings, and tail gray; chin, throat, 

 chest, and upper breast canary yellow, the chest with a central spot of chest- 

 nut; a broad white superciliary stripe. (Highlands of Mexico and Guatemala. ) 



Oreothlypis superciliosa (p. 477) 



OREOTHLYPIS GUTTURALIS (Cabanis). 

 iraztJ warbler. 



Adults {sexes alike). — Above plain slate-gray, the back with a large 

 triangular patch of black; lores, suborbital region, and anterior por- 

 tion of malar region l)lack, fading gradually into the slate-gray of the 

 malar region; chin, throat, and chest rich orange or cadmium orange 

 (var^nng to Indian yellow or cadmium 3'ello\v, sometimes almost flame 

 scarlet); median portion of breast, aljdomen, and under tail-coverts 

 white; sides and flanks light gray (no. 7 or no, 8); bill blackish, with 

 lower basal portion light colored; iris l)rown; legs and feet (in dried 

 skins) dusky horn color. 



Yoang female^ — Above dull plumbeous-gray, with a triangular 

 patch of ])lack on the back, as in the adult; chin, throat, and chest 

 pale dingy buff, the feathers grayish white beneath the surface, their 

 bases deeper grayish; rest of under parts whitish medially, grayish 

 laterally. 



Adult wva/^.— Length (skins), 106-122 (116); wing, 61-67 (65.5); 

 tail, 18-50 (18.7); exposed culmen, 10-12 (10.7); tarsus, 15-19 (17); 

 middle toe, 10-12 (10.7).' 



Adult female.— "Length (skins), 100-123 (111); wing, 59-61 (61.5); 

 tail, 12-48 (45), exposed culmen. 10-12 (11); tarsus, 18-19 (18.5); 

 middle toe, 11-12 (11.5).^ 



High mountains of Costa Rica (Volcan do Irazu; Rancho Redondo) 

 and Chiriqui (Volcan de Chiriqui). 



C'o)npsot]dy])is guUurall!^ Cab.wiis, Journ. fiir Orn., Sept., 18(50, 329 (Irazu, Costa 



Rica; coll. Berlin Mus. ). 

 Parula guUuralis Baird, Review Am. Birds, 1865, 169, 172 (Rancho RiHluudo, 



Costa Rica). — Lawrence, Ann. Lye. N. Y., ix, 1868, 93 (Irazii, Costa Rica. ) — 



Frantzius, Journ. fiir Orn., 1869, 292 (Irazu, Costa Rica). — Salvin, Proc. 



Zool. Soc. Lond., 1870, 182 (Volcan de Chiriqui, Chiriqui). — Boucard, Proc. 



Zool. Soc. Lond., 1878, 52 (Volcan de Irazu, alt. 6,000 ft.).— Salvin and 



GoDMAN, Biol. Centr.-Am., Aves, i, 1880, 123, pi. 8, fig. 3. — Nutting, Proc. 



U. S. Nat. Mus., v, 1882, 494 (Volcan de Irazii).— Sharpe, Cat. Birds Brit. 



Mus., X, 1885, 263, 643. 

 [Parula] gutturalis Sclater and Salvin, Nom. Av. Neotr., 1873, 8. 



^Described from a specimen (no. 2116) in the Costa Rica National Museum, from 

 .\nchiote, Costa Rica. 

 - Four sj)ecimens. 

 ■'Two sjjecimen.s. 



