584 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Adult male.— Length (skins), 113-136 (123); wing, 61.5-72 (66.5); 

 tail, 50-57 (53-8); exposed culmen, 10.5-13 (12.1); tarsus, 16-18 

 (16.9); middle toe, 9-10.5 (9.4). « 



Adult female.— 'Length (skins), 110-122 (117); wing, 58.5-64 

 (61.5); tail, 47.5-52.5 (49.5); exposed culmen, 10.5-13 (11.5); tarsus, 

 15.5-17 (16.2); middle toe, 8-9.5 (8.9).^ 



Uplands of Costa Rica (Barranca; Grecia; Cervantes; La Estrella 

 de Cartago; Juan Vinas; Dota; Azahar; Coliblanco; Burgos, on 

 Volcan de Irazu ; La Palma de San Jose; Quebrada Honda; Naranjo) 

 and w^estern Panama (Boquete, on Volcan deChiriqui, 4,000 to 6,500 

 ft. alt.; Calovevora). 



Empidonax flavescens Lawrence, Ann. Lye. Nat. Hist. N. Y., viii, 1867, 133 (Bar- 

 ranca, Costa Rica; colL U. S. Nat. Mus.); ix, 1868, 115 (Barranca, Grecia, 

 and Quebrada Honda, Costa, Rica). — ^Frantzius, Journ. fiir Orn., 1869, 308 

 (Costa Rica).— Sal viN, Proc. ZooL Soc. Lend., 1870, 198 (Calovevora and Vol- 

 can de Chiriqui, Panama; crit.). — Baird, Brewer, and Ridgv/ay, Hist. 

 N. Am. Birds, ii, 1874, 363.— Boucard, Proc. Zool. Soc. Lond., 1878, 64 

 (Naranjo, Costa Rica). — Ridgway, Ibis, 1886, 467 (diagnosis). — Sclater, 

 Cat. Birds Brit. Mus., xiv, 1888, 231 (Irazii and Dota, Costa Rica; Volcan de 

 Chiriqui and Calovevora, Panam.a). — Salvin and Godman, Biol. Centr.-Am., 

 Aves, ii, 1889, 75.— Bangs, Proc. New Eng. Zool. Club, iii, 1902, 39 (Boquete, 

 Panama, 4,000 to 6,500 ft.). 



[Empidonax] flavescens Sclater and Salvin, Nom. Av. Neotr., 1873, 52. — Sharpe, 

 Hand-list, iii, 1901, 139. 



E[mpido7iax] flavescens Baird, Brewer, and Ridgway, Hist. N. Am. Birds, ii, 

 1874, 363 (diagnosis). 



[Pyrocephalus] flavescens Gray, Hand-list, i, 1869, 361, no. 5503. 



Empidonax viridescens Ridgway, Proc. U. S. Nat. Mus. , vi, Apr. 11, 1884, 413 

 (Cervantes, Costa Rica; coll. IT. S. Nat. Mus.). 



EMPIDONAX ALBIGULARIS Sclater and Salvin, 

 WHITE-THROATED FLYCATCHER. 



Adults (sexes alike). — Above plain brownish olive or olive-brown, 

 the pileum slight h" darker and duller; tail deep grayish brown, the 

 outer webs of rectrices passing into light brownish olive on edges ; wings 

 darker grayish brown, the middle and greater coverts broadly tipped 



« Seventeen specimens. 

 b Eleven specimens. 



