498 TEOGONIDJi. 



Museum from Tequistlan and Tehuantepec, where they were labelled Trogon lucidus 

 by Lichtenstein, but never characterized, and for many years nothing more was heard 

 of this peculiar Trogon. 



. When the ornithology of Western Mexico was so carefully investigated by Grayson, 

 I. citreolus again appeared before us as, in the words of its rediscoverer, " well distri- 

 buted throughout the forests of the tierra caliente of this region." He adds that he 

 found it also at Tehuantepec, and that it is a native and does not migrate. Since then 

 we have received a plentiful supply of specimens from our collectors in Western 

 Mexico — Forrer, Eichardson, Lloyd, and Mrs. Herbert Smith, who found it at various 

 points in the States of Sonora, Jalisco, Colima, Guerrero, Oaxaca, and on the Isthmus 

 of Tehuantepec. 



Whether it is found further to the south we are as yet unable to say, but it very 

 likely occurs in the Department of Soconusco, if not in the Costa Grande of Guatemala. 



The type from Gould's collection and the specimen from Mazatlan have a distinct 

 bluish-green tint over the crown and the lower part and sides of the breast, which is 

 not present in any of the examples from Tehuantepec or from the coast northwards till 

 we come to Santiago, which lies on the north of the river of that name and not far 

 from Mazatlan. A male from this place has a slight tint over the feathers of the 

 crown. If it is found expedient to recognize two forms of T. citreolus, the original 

 name should be retained for the Mazatlan bird, and the southern form might be called 

 T. capistratus, Less., if, as may have been the case, the locality Eealejo was wjongly 

 given for Acapulco. Should T. capistratus prove to belong to T. melanocephalus, 

 Lichtenstein's uncharacterized title Trogon lucidus, given to Deppe's Tehuantepec birds, 

 may be employed. 



9. Trogon melanocephalus. 



Trogon melanocephalus, Gould, Mon. Trog. t. 12 '; ed.2, t. 27 '; Scl. P. Z. S. 1857, p. 227'; 1858, 

 p. 357*; 1859, pp. 367=, 387"; Moore, P. Z. S. 1859, p. 53'; Scl. & Salv. Ibis, 1859, 

 p. 132 ^ P. Z. S. 1870, p. 837"; Taylor, Ibis, 1860, p. 117'°; Lawr. Ann. Lye. N. Y. viii. 

 p. 184"; Salv. Ibis, 1870, p. 115"; 1872, p. 322"; 1889, p. 371"; 1890, p. 88'=; Sumi- 

 chrast. La Nat. x. p. 239 " ; Nutting, Pr. U. S. Nat. Mus. v. p. 400 " ; vi. pp. 376 ", 387 ", 

 395 ="; Boucard, P. Z. S. 1883, p. 454" ; Ridgw. Pr. U. S. Nat. Mus. x. p. 581 "; Herrera, 

 La Nat. (2) i. p. 321 "; Grant, Cat. Birds Brit. Mus. xvii. p. 462"; Richmond, Pr. U. S. 

 Nat. Mus. xvi. p. 515 '=. 



Aganus melanocephalus, Cab. & Heine, Mus. Hein. iv. Heft 1, p. 197 ''. 



Supra nitide cyaneo-viridis, uropygio nitide purpureo ; capite toto, gula, pectore et alls nigris, harum remigibus 

 ad basin albo limbatis, abdomine toto et teotricibus subcaudalibus oitrino-aurantiia ; caudae rectricibua 

 duabus mediis dorso concoloribus nigro termiuatis, rectricibus tribus lateralibus nigris macula subquadrata 

 alba terminatis, rectricibus reliquis nigris in pogonio externo mediis concoloribus. Long, tota 10-5, 

 caudae rectr. med, 5-8, rectr. lat. 4-0. 



$ supra sohj^taceo-nigra, rectricibus mediis nigro terminatis, gula et pectore dorso concoloribus, abdomine et 



