700 Annals of the Carnegie Museum. 



70 (Costa Rican reference). — Cherrie, Auk, VII, 1890, 344 (San Jose, 

 two specimens, Sept. 17 and Oct.. 4, 1889). 

 Empidonax virescens Ridgway, Birds N. and Mid. Amer., IV, 1907, 552 (eastern 

 U. S., south in winter through Central America to Ecuador. — Costa Rica: 

 San Jose). 



A rare winter visitor, probably found only in the highlands. Mr. Cher- 

 rie reported it as fairly common about San Jose in May, 1890, but there 

 must have been an unusually large flight there that year, for it is not a 

 common bird in Costa Rica by any means, very few specimens of it ever 

 having been taken. 



458. Empidonax flaviventris (Baird). 



Tyrannula flaviventris Baird (Wm. M. and S. F.), Proc. Acad. Nat. Sci. Phila., 

 I, 1843, 283 (Carlisle, Pennsylvania, type now in U. S. Nat. Mus.). 



Empidonax flaviventris Lawrence, Ann. Lye. N. Y., IX, 1868, 114 (Grecia 

 [J. Carmiol], Navarro [J. Cooper]). — Frantzius, Jour, fur Orn., 1869, 308 

 (Costa Rica). — Zeledon, An. Mus. Nac. de C. R., I, 1887, 117 (Grecia and 

 Pozo Azul de Pirris). — Sclater, Cat. Birds Brit. Mus., XIV, 1888, 230 

 (Angostura [Carmiol]). — Salvin and Godman, Biol. Centr.-Am., Aves, II, 

 1889, 73 (Costa Rican references). — Cherrie, Auk, VII, 1890, 334 (San 

 Jose, Oct. 27, 1889); IX, 1892, 251 (rare at San Jose, only Sept. and Oct.); 

 Expl. Zool. en C. R., 1890-1, 1893, 34 (Lagarto, Boruca, Buenos Aires, and 

 Terraba). — Ridgway, Birds N. and Mid. Amer., IV, 1907, 549 (eastern 

 North America, south in winter through Central America to Colombia. — 

 Costa Rica: San Jose, Navarro, Angostura, Grecia, Pozo Azul de Pirris). — 

 Bangs, Auk, XXIV, 1907, 302 (Boruca and El Pozo de Terraba, April 9 to 

 May 9, 1906 [Underwood]). 



U. S. Nat. Museum: Guayabo, March 12 to 31, 1908 (Ridgway and Zele- 

 don), Bonilla, April 11, 1908 (Basulto). 



Bangs Collection: San Jose, Oct. 7; El Pozo de Terraba, April 9 to 15; 

 Pozo Azul de Pirris, Feb. 17; Tenorio, Feb. 7; La Vijagua, Feb. 24; 

 Bolson, Dec. 14 (Underwood). 



Fleming Collection: Carrillo, October; Pozo Azul de Pirris, February 

 (Underwood). 



C. H. Lankester Collection: Cachi, Nov. 1, 1908. 



Carnegie Museum: Guapiles, March 4; Volcan de Turrialba, 2,000 feet, 

 April 22 (Carriker & Crawford); Juan Vinas, March n; April 12 

 and 22; Guapiles, Jan. 11; Bebedero, April 30; El Hogar, Nov. 23, 

 Jan. 19, Feb. 10; Peralta, Nov. 9 and 12 (Carriker). Twelve skins. 

 This is by far the most abundant Empidonax wintering in Costa Rica, 



being found in almost all portions of the country up to 4,000 feet, but most 



commonly on the Caribbean watershed between sea-level and 3,000 feet. 



