564 Annals of the Carnegie Museum. 



men taken by Boucard at Puntarenas in 1877. Mr. Cherrie reports 

 it to be found on both coasts and in the interior up to 6,000 feet, but 

 I have never seen the bird on the Caribbean slope, nor do I know of 

 any specimens which were taken there. In fact I believe it to be con- 

 fined to the Pacific slope, rare on the higher portions and only to be 

 found in comparative abundance on the western side of the Gulf of 

 Nicoya. 



293. Coccyzus americanus americanus (Linnaeus). 



Cuculus americanus Linnaeus, Syst. Nat., ed. 10, I, 1758, 111. 



Coccyzus americanus Bonaparte, Jour. Ac. Nat. Sci. Phila., Ill, ii, 1824, 367. — 

 Cabanis, Jour, fur Orn., 1862, 167 (C. R. [Frantzius]). — Lawrence, Ann. 

 Lye. N. Y., IX, 1868, 128 (C. R. [Frantzius]). — Zeledon, An. Mus. Nac. 

 de C. R., I, 1887, 123 (San Juan de San Jose, Cartago). — Cherrie, Auk, 

 VII, 1890, 333; IX, 1892, 327 (San Jose, Sept. 10 to 28, three specimens). — 

 Shelley, Cat. Birds Brit. Mus., XIX, 1891, 308 (no C. R. specimens). — 

 Salvin and Godman, Biol. Centr.-Am., Aves, II, 1896, 525, part (C. R. 

 references). 



Although the western form of the Yellow-billed Cuckoo has been 

 taken in Costa Rica, I have placed all the published references to C. 

 americanus under the eastern form, typical americanus, for the reason 

 that it is almost always the eastern variety of any species that is taken 

 in Costa Rica, when such a species is represented by two races in the 

 United States. The birds of western North America do not (with a 

 few exceptions) migrate so far south as the eastern ones, on account 

 of the climate being warmer on that side, the birds finding suitable 

 winter quarters much farther north than are found on the eastern 

 side. 



The cuckoos are not common winter visitors to Costa Rica, not a 

 great many of them being seen or collected, so that it is not possible 

 to determine just what portion of the country they inhabit during their 

 sojourn there. However, I should suppose the present species, as well 

 as the following one, to be confined more to the highland region than 

 to the lowlands. 



294. Coccyzus americanus occidentalis Ridgway. 



Coccyzus americanus occidentalis Ridgway, Man. N. Am. Birds, 1887, 273. — 

 Bangs, Proc. N. Eng. Zool. Club, IV, 1908, 24 (San Jose, Oct. 25, 1905 

 [Underwood]). 



The first and only record that can be taken as authentic for the 

 presence of this form in Costa Rica is the specimen collected by 



