96 Mr. J. Gould on four new species of Humming-birds. 



tentacula long, and blackish like the back of the neck; the 

 lower tentacula short. 



There is a raised, tubercular, mucous ? pore above and near 

 the extremity of the foot, not lengthened and overhanging as 

 in Nanina? (Macrochlamijs, B., 1832) vitrinoides. A black 

 excrementitious-looking matter is generally found in the ori- 

 fice of the pore. The animal is active, and not easily alarmed. 

 The narrow form of the foot bears the necessary relation to the 

 curious linear aperture of the shell. Have the North American 

 forms of Tridopsis the mucous pore and a similarly narrow 

 foot? 



It will be interesting to know, also, whether the Cingalese 

 forms associated with Helix Achatina under Ophiogyra, Pfr., 

 such as H. Rivolii, &c, are ovoviviparous. 

 Cheltenham, July 4th, 1859. 



X. — Descriptions of four new Species of Humming-birds from 

 Mexico. By John Gould, Esq., F.R.S. &c. 



To the Editors of the Annals and Magazine of Natural History. 



20 Broad Street, Golden Square, W., 

 Gentlemen, July 13, 1859. 



I send you herewith, for insertion in the next Number of your 

 Magazine, descriptions of four new species of Mexican Humming- 

 birds, for the first of which I am indebted to the researches of 

 M. Rafael Montes d'Oca, and for the three others to M. Adolphe 

 Boucar, through the kindness of M. Salle. 



I am, Gentlemen, 



Your very obedient Servant, 



John Gould. 

 Amazilia Ocai. 



Crown, sides of the head, throat, and breast glittering grass- 

 green, with a few of the white bases of the feathers showing 

 on the centre of the throat ; back of the neck and upper part 

 of the back deep green; upper and under wing-coverts, flanks, 

 lower part of the back, upper tail-coverts and tail greenish 

 bronze; under surface of the base of outer tail-feathers red- 

 dish buff; wings purplish brown; base of the secondaries 

 reddish buff; abdomen pale brown; under tail-coverts light 

 bronze margined with white ; bill black, lighter beneath ; feet 

 brown. 



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



Habitat. Xalapa, in Southern Mexico. 



Remark. This species cannot be confounded with any other 



