5. TKOGON. 463 



Trogonunis melanocephalus, Bonap. Consp. Vol. Zyg. p. 14 (1854). 

 Trogou (Agauus) melanocephalus, Gvatj, Hand-l. B. i. p. 82 (1869). 



Adult male. Head, nape, and chest blackish grey ; back bluish 

 green glossed with gold and shading graduallj' into purplish blue on 

 the rump and upper tail-coverts ; breast and rest of underparts 

 orange-yellow ; thighs and wings black, quills with white bases 

 and the basal half of the outer web of the primaries margined with 

 white ; centre pair of tail-feathers bronze-green, with blue reflexions 

 and a black terminal band ; second and third pairs the same with 

 the inner web black, three outer pairs black with the last inch 

 white meeting the black nearly horizontally : bill whitish, darker 

 towards the base. Total length 10-7 inches, wing 5-5, tail 5*5, 

 tarsus 0-55. 



Immature males differ from the adult in having the outer webs 

 of the secondaries margined with whitish spots ; the black of the 

 outer web in the three outer pairs of tail-feathers is toothed with 

 white, and the middle pairs of tail-feathers are black glossed with 

 greenish bronze. 



In a much younger specimen the wing-coverts and secondaries 

 are spotted and edged on the outer web with buff. 



Adult female. Head, upper parts, and chest dark grey ; rest of 

 underparts orange-yellow ; wings and three outer pairs of tail- 

 feathers as in the adult male ; three middle pairs of tail-feathers 

 blackish grey, with a black terminal band. Total length 10-4 inches, 

 wing 5'5, tail o'o, tarsus 0"G. 



Less mature females have the outer web of the three outer pairs 

 of tail-feathers toothed with white ; otherwise they resemble the 

 above. 



Hah. Ranging from Southern Mexico to Costa Eica. 



a,b. c? $ ad. sk. Mexico {D'Oca). Gould Coll. 



c. c? ad. sk. Tampico, Feb. [Richardson). Salvin-Godman Coll. 



d. 2 ad. sk. Vera Cruz, Feb. {Richardson). Salvin-Godman Coll. 



e. (S ad. sk. Playa Vicente, Vera Cruz, Salvin-Godman Coll. 



Dec. (Trujillo). 



f. (S nr. ad. sk. Misantla, Vera Cruz, Dec. Salvin-Godman Coll. 



(Triiji/lo). 

 (J. $ ad. sk. Laguna Verde, Vera Cruz, Salvin-Godman Coll. 



Sept. {Trujillo). 

 h-l. S ? ad. sk. Teapa, Tabasco, Feb., March Salvin-Godman Coll. 



{Smith), 

 tn. 5 ad. sk. Vera Paz, Guatemala Salvin-Godman Coll. 



{Hafftie). 

 n. S ad. sk. Choctum, Vera Paz {Salvin). Salvin-Godman Coll. 



0. $ ad. sk. Meco I., Yucatan, Nov. Salvin-Godman Coll. 



{Gat(7ner). 

 p, q- 6 2 ad. sk. Yucatan, May {Gaimier). Sclater Coll. 



r, s. d $ ad. sk. Northern Yucatan {Gaumer). Salvin-Godman Coll. 

 t. c? imm. sk. Merida, Yucatan, May (/Sft^o^i). Salvin-Godman CoU. 



u-a'. (S 5 ad. sk. Buctzotz, Y'ucatan, April Salvin-Godman Coll. 



{Gaumer). 

 b'-f. S 2 ad. sk. Peto, Y^icatan, April Salvin-Godman Coll. 



{Gaumer). 



