498 TROGONID. 
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, 
T. 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, Richardson, 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 7. 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 Realejo was wrongly 
given for Acapulco. Should TZ. capistratus prove to belong to 7. 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. 121; ed.2, t. 27°; Scl. P. Z.S. 1857, p. 227°; 1858, 
p. 857°; 1859, pp. 367°, 387°; Moore, P. Z. S. 1859, p. 537; Scl. & Salv. Ibis, 1859, 
p. 182°; 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. 822”; 1889, p.371™; 1890, p.88”; Sumi- 
chrast, La Nat. x. p. 239"; Nutting, Pr. U. S. Nat. Mus. v. p. 400"; vi. pp. 8767, 887, 
395"; Boucard, P. Z. 8. 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. 4627'; 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 alis nigris, harum remigibus 
ad basin albo limbatis, abdomine toto et tectricibus subcaudalibus citrino-aurantiis ; caude rectricibus 
duabus mediis dorso concoloribus nigro terminatis, rectricibus tribus lateralibus nigris macula subquadrata 
alba terminatis, rectricibus reliquis nigris in pogonio externo mediis concoloribus. Long. tota 10-5, 
caude rectr. med. 5:8, rectr. lat. 4:0. 
2 supra schistaceo-nigra, rectricibus mediis nigro terminatis, gula et pectore dorso concoloribus, abdomine et 
