358 Messrs. Salviii and Elliot on the Trochilidse. 



black is not always present, however, is evidenced by the fact 

 that Mr. Gould had named examples among his T. nigrofas- 

 ciata destitute of this band, viridipectus. This mark therefore 

 cannot be taken as an indication of specific value. The shape 

 of the throat-mark also varies greatly in a number of indi- 

 viduals ; and two are now lying before us, from Elliot's col- 

 lection, obtained by Mr. Bartlett at Chyavetas and Chami- 

 curos respectively, of which the former has the green of the 

 throat extending well down on the breast, with a slight indi- 

 cation of black edging, while the latter has a square truncated 

 mark destitute of any black band whatever. It would there- 

 fore appear that these two forms cannot be separated speci- 

 fically, but that the single species should stand as T. nigrofas- 

 ciata, the name first applied to it by Mr. Gould, and that it 

 extends through Ecuador into Peru. 



We have examined the following specimens : — 

 Rio Napo : two (ex Gould), Mus. P. L. S. ; one (ex Gould), 

 Mus. D. G. E. Ucayali: one (ex Gould), Mus. D. G. E. 

 Ecuador: one (Buckley), Mus. S. & G. Pebas, Peru: two 

 (Hauxwell), Mus. S. & G. Chamicuros : two (Bartlett), Mus. 

 D. G. E. Chyavetas : two (Bartlett), Mus. D. G. E. Guiana, 

 Oyapock : five (Verr), Mus. D. G. E. 



7. Thalurania watertoni. 



Trochilus watertoni, Bourc. P. Z. S. 1847, p. 44. 



Thalurania watertoni, Gould, Mon. Troch. vol. ii. pi. 100; 

 Intr. Mon. Troch. p. 76. 



Hab. British Guiana. 



This very distinct species was described by Bourcier from 

 a specimen in the Loddiges collection obtained by Mr. Water- 

 ton on the Mibiri creek, near the river Essequibo. It is re- 

 markable for its very long and deeply-forked tail. But few 

 specimens of it are known, and it still remains a desideratum 

 to our collections. 



8. Thalurania refulgens, Gould, P. Z. S. 1852, p. 9; id. 

 Mon. Troch. vol. ii. pi. 102 ; id. Intr. Mon. Troch. p. 77. 



Hab. Trinidad. 



This bird, among the largest of this group, is apparently a 



