Mr. J. Gould on four new S])ecies of Humming-birds. 97 



member of the genus Amazilia ; it is about the size of A. Rief- 

 feri, autl has a splendid glittering green crown. I have named 

 this bird in honour of M. Rafael Montes d'Oca, who has exerted 

 himself to make us acquainted with the productions of Southern 

 Mexico, perhaps to a greater extent than any other person. 



Calothorax pulchra. 



Male. Throat-gorget fine deep metallic lilaceous purple ; head, 

 upper surface, wing-coverts, and flanks green ; wings purplish 

 brown ; tail brownish black ; breast and centre of the abdomen 

 white ; bill black ; feet dark brown. 



Total length 2^ inches; bill |; wing If; tail l T 5 g. 



Female. Head dull greyish brown; upper surface bronzy 

 green; throat and under surface buff; wings purplish brown; 

 two centre tail-feathers green, the next on each side green tipped 

 with black, the remainder rusty red at the base and white at the 

 tip, the intervening space being black. 



Habitat. Oaxaca, in Western Mexico. 



Remark. Allied to C. cyanopogon, but differs in the much 

 smaller size of the gorget and in the greater breadth of the 

 outer tail-feathers. 



Cyanomyia violiceps. 



Male. Crown of the head deep violet-blue ; all the upper sur- 

 face and wing-coverts olive-green ; wings purplish brown ; tail 

 deep greenish bronze ; all the under surface white ; bill black ; 

 under mandible rather lighter ; feet blackish brown. 



Total length 4^ inches ; bill 1 ; wing 2\ ; tail If. 



Female or young. Crown ashy brown ; upper surface olive- 

 green, each feather margined with greyish olive; tail-coverts 

 and tail coppery bronze, tipped with greyish olive; under sur- 

 face white, stained with rusty red on the flanks. 



Habitat. Oaxaca, in Western Mexico. 



Remark. This is a very distinct species, about the size of C. 

 quadricolor, from which it differs in having a black bill and 

 in its violet-coloured crown. 



Cyanomyia ? sordida. 



Male. Head and under surface greyish brown; behind the 

 eye a white spot ; all the upper surface and the sides of the 

 neck bronzy green ; wings purplish brown ; tail dark greenish 

 bronze, approaching to black on the base of the under surface; 

 under tail-coverts very pale brown, with lighter edges ; the bill 



Ann. % Mag. N. Hist. Ser. 3. Vol. iv. 7 



