GEKERA AND SPECIES. 179 



It is the Ornismya furcata of Lesson. Another 

 species is the Trochilus Wagleri of Lesson, de- 

 scribed in the same work, vol. ii. p. 83, pi. 16. 

 (Trochilus sapphirinus of Vieillot ?) 



As farther examples of this lovely group we 

 select the following species from Mr. Gould's 

 cabinet. 



Trochilus (Thalurania) nigrofasciatus, Gould. 



This species is nearly allied to Ornismya fur- 



\ cat a. The throat is lustrous green; the abdo- 



i men and edge of the shoulders are shining blue, 



j separated from the green of the throat by a 



| lunate band of black ; head and back of neck 



; bronze green ; back and wing-coverts brownish 



! green ; wings brown ; tail considerably forked, 



and of a dull steel blue ; bill black. 



Total length, 4 inches; bill, | ; tail, If. 

 Locality : Bio Negro, Brazil. 

 Trochilus (Thalurania) Watertoni (Trochilus 

 ! Watertonii, Bourcier, from Loddiges' MSS. Med. 

 Proc. Zool. Soc. 1847). In the male, the beak 

 4s black and rather stout, almost straight; the 

 'head is covered with scaly feathers of a golden- 

 igreen ; the back and shoulders are of a brilliant 

 iviolet blue ; the tail-coverts greenish blue ; the 

 jthroat gorget is brilliant green ; the under parts 

 ideep blue; under tail-feathers blackish blue; 

 wings falciform, and black blue ; the tail is very 

 iecidedly forked, the feathers being regularly 

 : graduated from the central pair to the outer- 

 Host ; colour violaceous black blue. 



