Messrs. Salvin and Elliot on the Trochilidac. 357 



5. Thalurania furcatoides. 



Thalurania furcatoides, Gould, Iutr. Mon. Troch. p. 77. 



Thalurania forficata, Cab. & Hein. Mus. Hein. p. 24, TV iii. 



Thalurania subfurcata, Heine, Journ. fur Ornith. 1863, 

 p. 181. 



Hab. Para. 



This is the Lower- Amazonian form of T.furcata, and while 

 closely resembling that species, apparently differs constantly 

 in possessing a much shorter and less forked tail. In the dis- 

 tribution of the colours of its plumage and their hues, it assi- 

 milates closely to T. furcata. 



We include among the synonyms of this species the T. sub- 

 furcata of Heine, as we do not recognize any characters 

 given by him in his description to lead us to consider it 

 distinct from T. furcatoides from the same locality. 



Para: one {Verr.), Mus. D. G. E. 



6. Thalurania nigrofasciata. 



Trochilus nigrofasciatus, Gould, P. Z. S. 1846, p. 89. 



Thalurania nigrofasciata, Gould, Mon.Troch.vol.ii.pl. 104; 

 Intr. Troch. p. 78. 



Thalurania tschudii, Gould, P.Z. S. (1860), p. 312; Intr. 

 Troch. p. 78. 



Thalurania viridipectus, Gould, P.Z. S. 1818, p. 13. 



Hab. Ecuador and Peru. 



This species was first described by Mr. Gould in 1846 from 

 specimens obtained in Ecuador. In 1860 Mr. Gould named 

 a bird contained in the museum at Neuchatel, collected by 

 Dr. Tschudi in Peru, T. tschudii. Specimens of this form 

 have also been procured by Mr. Hauxwell at Pebas, and by Mr. 

 Bartlett at Chyavetas and Chamicuros ; and Mr. Hauxwell 

 has also sent from Pebas examples of T. nigrofasciata. The 

 chief difference between these forms, as stated by Mr. Gould, 

 and which has induced him to give them each specific rank, 

 is, that the green of the throat in T. nigrofasciata is carried 

 down upon the breast somewhat to a point, and surrounded 

 by a narrow black band, while T. tschudii has the throat-mark 

 truncated in shape and destitute of a black band. That the 



