798 Annals of the Carnegie Museum. 



embracing the higher parts of the whole of the Terraba basin, from about 

 600 up to 2,000 feet or higher. 



The species frequents open woodland, scattering trees, the borders of 

 the savannas and second-growth scrub. It is not an abundant bird in 

 Costa Rica. 



593. Basileuterus rufifrons delattrii (Bonaparte). 



Basileuterus delattrii Bonaparte, Compt. Rend. XXXVIII, 1854, 383 (Nica- 

 ragua). — Cabanis, Jour, fur Orn., i860, 325 (highlands of Costa Rica 

 [Frantzius, Hoffmann, and Ellendorf]). — Cherrie, Proc. U. S. Nat. Mus., 

 XIV, 1891, 340 (Costa Rica; crit.); 527 (San Jose; descr. young); Auk, IX, 

 1892, 22 (San Jose; descr. nest and eggs). 



Basileuterus mesochrysus (not of Sclater, i860) Baird, Review Am. Birds, 1865, 

 250 (San Jose [Carmiol]). — Lawrence, Ann. Lye. N. Y., IX, 1868, 95 (San 

 Jose, Grecia, and Guaitil [J. Carmioll). — Frantzius, Jour, fiir Orn., 1869, 

 294 (Costa Rica). — Boucard, P. Z. S., 1878, 52 (San Jose and Cartago). — ■ 

 Salvin and Godman, Biol. Centr.-Am., Aves, I, 1881, 176, part (Costa Rican 

 references). — Nutting, Proc. U. S. Nat. Mus., V, 1882, 499 (San Jose). — 



• Zeledon, An. Mus. Nac. de C. R., I, 1887, 107 (San Jose, Alajuela, Juan Vinas, 

 Grecia, and Monte Redondo). — Underwood, Ibis, 1896, 434 (Miravalles). 



[Basileuterus delattrii] subsp. a. Basileuterus mesochrysus Sharpe, Cat. Birds 

 Brit. Mus., X, 1885, 396, part (Volcan de Irazu [Rogers], Grecia [Carmiol]). 



Basileuterus rufifrons delattrii Ridgway, Birds N. and Mid. Amer., II, 1902, 

 749 (Nicaragua and Costa Rica: San Jose, Cartago, San Juan, Guaitil, Grecia, 

 Alajuela, etc.). — Bangs, Proc. Biol. Soc. Wash., XXII, 1909, 36, in text 

 (Tenorio and Cerro de Santa Maria). 



U. S. Nat. Museum: Guayabo (Ridgway and Zeledon), Santa Maria de 



Dota (Basulto), San Jose (Cherrie) (Alfaro) (Underwood). 

 Bangs Collection: Tenorio, Cerro de Santa Maria, San Jose (Underwood). 

 C. H. Lankester Collection: Guanacaste and Cachi. 

 Carnegie Museum: San Jose (Underwood), Juan Vinas, Esparta, La 

 Hondura, Bagaces (Carriker). Eight skins. 



A common warbler all over the highlands of Costa Rica from 2,000 up 

 to 4,000 feet on both the Caribbean and Pacific slopes, except the Terraba 

 Valley. On the Pacific slope it extends to a lower altitude than on the 

 Caribbean, being found in small numbers as low as 500 feet above sea- 

 level in the Tempisque Valley. Its habits are the same as those of the 



preceding form. 



594. Myioborus torquatus (Baird). 



Setophaga torquata Baird, Review Am. Birds, 1865, 261 (San Jose, Costa Rica 

 [Frantzius]; coll. U. S. Nat. Mus.). — Lawrence, Ann. Lye. N. Y., IX, 



1868, 96 (San Jose and La Palma [Frantzius]). — Frantzius, Jour, fur Orn., 



1869, 294 (La Palma). — Boucard, P. Z. S., 1878, 53 (Volcan de Irazu). — 



