432 Annals of the Carnegie Museum. 



Biol. Centr.-Am., Aves, III, 1901, 185 (references cited). — Cherrie, Expl. 



Zool. en C. R., 1891-2, 1893, 52 (Rio Grande de Terraba). 

 Cancroma cochlearia Lawrenck, Ann. Lye. N. Y., IX, 1868, 142 (Rio Grande 



[Cooper]). — Frantzius, Jour, fur Orn., 1869, 376 (C. R.). — Nutting, 



Proc. U. S. Nat. Mus., V, 1882, 496 (La Palma de Nicoya). 

 Cochlearia ziledoni RICHMOND, Proc. U. S. Nat. Mus., XVI, 1893, 527 (Rio 



Frio). 



Bangs Collection : Bolson (Underwood). 

 C. H. Lankester Collection : Cimmarones. 



Carnegie Museum : Pozo Azul de Pirris and Las Ajuntaderas de Ter- 

 raba (Carriker). Two skins. 



Ranges over the lowlands of both the Pacific and Caribbean, but is 

 more abundant on the Pacific side. Their habits are very similar to 

 those of Tigriso7na and Heterocnus, that is, they are usually seen 

 perched on a low limb of a tree on the edge of some creek or river. 

 They are quite tame and easily approached. They evidently feed 

 during the early morning and evening and perhaps during the night 

 after the manner of the night-herons, hiding away during the hours 

 of daylight. 



100. Butorides virescens maculata (Boddaert). 



Ardea virescens Frantzius, Jour, fur Orn., 1869, 376 (Salitral, Rio Tirribi). — 

 Zeledon, An. Mus. Nac. de C. R., I, 1887, 130 (Liberia, Desamparados, 

 San Joaquin, San Jose). — Cherrie, Expl. Zool. en C. R., 1890-1, 1893 

 (Rio Grande de Terraba); Auk, VII, 1890, 332; IX, 1892, 329 (San Jose, 

 tolerably common resident). — Salvin and Godman, Biol. Centr.-Am., Aves, 

 III, 1901, 169 (Talamanca, Bahia de Salinas, Alajuela, Puntarenas, San 

 Lucas, Las Trojas, La Estrella, Azahar, Jimenez (Underwood). 



Butorides virescens Lawrence, Ann. Lye. N. Y., IX, 1868, 142 (C. R. [Frant- 

 zius]). — Nutting, Proc. U. S. Nat. Mus., V, 1882, 406 (La Palma de 

 Nicoya). — Ridgway, Proc. U. S. Nat. Mus., V, 1882, 502 (San Jose, Nut- 

 ting). — Underwood, Ibis, 1896, 450 (Miravalles). — Sharpe, Cat. Birds 

 Brit. Mus., XXVI, 1898, 186 (C. R. [J. Carmiol and Endres]). — Bangs, 

 Auk, XXIV, 1907, 289 (El Pozo de Terraba). 



B utorides virescens maculata Bangs, Birds of Isle of Pines, Araer. Nat., XXXIX, 

 1905, 188. 



Bangs Collection : Azahar de Cartago and San Jose (Underwood). 

 Carnegie Museum : Guapiles, Cuabre, El Pozo de Terraba (Carriker). 



Five skins. 



The most abundant and most widely distributed of all the herons in 

 Costa Rica. It is found over the whole of the country wherever 

 creeks, rivers, or ponds exist, up to an altitude of not less than 5,000 



