BIRDS OF NORTH AND MIDDLE AMERICA. 759 



TROGON MELANOCEPHALUS ILL-ffiTABILIS Bangs. 



SLATY-HEADED TROGON. 



Similar to T. m. melanoceplialus, but head, neck, and chest more 

 slaty, the chest often slate-gray in adult female; slightly larger. 



Adult /naZe.— Length (skins), 260-288 (268); wing,' 132.5-148.5 

 (143.8); tail, 143.5-158.5 (151.9); culmen, 19.5-23.5 (21.2); tarsus, 

 13.5-15 (14.5); inner anterior toe, 14-15 (14.5).« 



Adult female.— ljengi\\ (skins), 255-267 (259); wing, 140-150.5 

 (144.3); tail, 142.5-156 (148.8); culmen, 19.5-22 (20.5); tarsus, 

 13.5-15 (14.2); middle toe, 14-15.5 (14.6).^ 



Western Costa Rica (Bolson; Bebedero; Barranca de Punta 

 Arenas; Tenorio; Volcan de Miravalles) and western Nicaragua 

 (Sucuya; Realejo; Managua; Omotepe; San Geronimo, Chinandega; 

 Grenada) . 



Trogon mdanocephalus (not of Gould) Nutting, Proc. U. S. Nat. Mus., v, 1882, 

 400 (La Palma de Nicoya, w. Costa Rica; habits); vi, 1883, 376, 387, 395 

 (San Juan del Sur, Sucuya, and Omotepe, Nicaragua). — Grant, Cat. Birds 

 Brit. Mus., xvii, 1892, 462, part (Virgin Bay and Volcdn de Chinandega, w. 

 Nicaragua; Costa Rica?). — Salvin and Godman, Biol. Centr.-Am., Aves, ii, 

 1896, 498, part (San Juan del Sur, Sucuya, Omotepe, Virgin Bay, and Volcdn 

 de Chinandega, w. Nicaragua; La Palma de Nicoya, w. Costa Rica). — 

 Underwood, Ibis, 1896, 444 (Volcdn de Miravalles and Bagaces, n. w. Costa 

 Rica). — (?)Alfaro, Paginas Illustradas, i, 1904, 530, 531 (Costa Rica; nesting 

 habits; fig. of nest). — Bangs, Auk, xxiv, 1907, 294 (Barranca de Punta Arenas, 

 w. Costa Rica). 



{'^)T[rogon\ melano-cephalus Lawrence, Ann. Lye. N. Y., ix, 1868, 120, in text 

 (Costa Rica). 



Trogon melanoceplialus illaetabilis Bangs, Proc. Biol. Soc. Wash., xxii, March 10, 

 1909, 30 (Bolson, w. Costa Rica; coll. E. A. and O. Bangs). — Carriker, 

 Ann. Carnegie Mus., vi, 1910, 560 (Nicoya peninsula and s. Guanacaste, 

 w. Costa Rica. 



TROGON CITREOLUS Gould. 



CITREOLINE TROGON. 



Adult male. — Pileum, hindneck, and sides of head and neck 

 blackish slate, passing gradually into slate color on cliin, throat, and 

 chest; back and scapulars metallic golden green, passing into metallic 

 bluish green or greenish blue (sometimes tinged with violet-blue) on 

 rump and upper tail-coverts, the extreme upper portion of back 

 sometunes bluish green; middle pair of rectrices metalhc green or 

 bronze-green, abruptly and rather narrowly tipped with black, the 

 outer web of next two pairs similar but inner web wholly black; 

 three outer pairs black basally, extensively white terminally, the 

 white on outermost rectrix occupying about half of inner web and 

 all but basal portion of outer web, that on the third (from outside) 

 about terminal thii'd of outer and fourth of inner web; wing-coverts 



a Seventeen specimens. * Ten specimens, from western Costa Rica. 



