558 Annals of the Carnegie Museum. 



T. puella, the nearest relative in Costa Rica to 7. elegans, is con- 

 fined to the mountains of the central portion of the country, or rather 

 to the main continental divide, but is not taken in the Aguacate 

 Mountains or the highlands of the Guanacaste district, where it is re- 

 placed by T. aurantiivenlris underwoodi. As a rule, it is not found 

 below 3,000 feet, although a few straggle down lower (Carrillo and 

 Volcan de Turrialba, 2,000 feet). It is to be found in the heavy forest 

 as well as among scattered trees in pastures and open places. 



284. Trogon aurantiiventris underwoodi (Bangs). 



Trogon aurantiiventris Gould, P. Z. S., 1856, 107 (Chiriqui, Panama). — Law- 

 rence, Ann. Lye. N. Y., IX, 1868, 118 (Barranca [J. Carmiol]). — Frant- 

 zius, Jour, fur Orn., 1869, 312 (San Mateo, Guaitil and San Juan de San Jose) . 

 ■ — Ogilvie-Grant, Cat. Birds Brit. Mus., XVII, 1892, 454 (Barranca [J. 

 Carmiol]). — Underwood, Ibis, 1896, 444 (Miravalles). 



Trogon aurantiiventris Salvin and Godman, Biol. Centr.-Am., Aves, II, 1892, 

 491, part. 



Trogon underwoodi Bangs, Proc. N. Eng. Zool. Club, IV, 1908, 24 (Volcan de 

 Miravalles, Oct. 28, 1895 [Underwood]); Proc. Biol. Soc. Wash., XXII, 1909, 

 30 (Tenorio, Cerro de Santa Maria [Underwood]). 



Carnegie Museum; Miravalles, Bagaces (Carriker). Nine skins. 



Trogon aurantiiventris Gould, described from Chiriqui, is quite 

 different from Costa Rican birds of the aurantiiventris type, as has 

 been clearly pointed out by Mr. Bangs (see description of T. under- 

 woodi^). The Costa Rican birds are just about intermediate between 

 T. puella and aurantiiventris, exhibiting shades of color on the 

 abdomen of varying intensity, but never as yellow (orange) as in 

 aurantiiventris or as red as in puella. Since the ranges of T. underwoodi 

 and T. puella overlap to a considerable extent, it is obvious that under- 

 woodi has its nearest affinity in aurantiiventris rather than in puella, 

 being a northern race of the former. 



It is confined chiefly to the highlands of Nicoya and Guanacaste, 

 the Aguacate Mountains and the western edge of the central plateau 

 region, being found in company with T. puella in the latter section, 

 but in small numbers, occurring much more abundantly in Guanacaste 

 than in any other region. 



285. Trogon atricollis tenellus (Cabanis). 



Trogon atricollis Vieillot, N. Diet. d'Hist. Nat., VIII, 1817, 318. — Zeledon, 



An. Mus. Nac. de C. R., I, 1887, 120 (Las Trojas, Angostura, Pacuare). — 



Cherrie, Expl. Zool. en C. R., 1891-2, 1893, 47 (Lagarto and Boruca). — 



