42 Mr. D. G. Elliot on the Trochilidse. 



CayennCj Guiana, and Brazil as far south as Bahia. Hr, Heine 

 has described a bird, from the neighbourhood of Bogota, 

 brought by M. Lindig, and called it Agyrtria terpna (/. c), 

 I am not acquainted autoptically with it ; but I cannot per- 

 ceive any thing in the description to separate it from T. leuco- 

 gaster : and I have placed its name among the synonyms of the 

 present species with a mark of doubt; for of course I do 

 not pretend to form any definite opinion until I have had 

 an opportunity of examining the type. The measurements 

 given are the same as those of T. leiicogaster ; and the two 

 birds seem to have the same black tail, which is one of the 

 chief specific characters of T. leiicogaster among the members 

 of the group to which it belongs. If I am right in placing 

 Hr. Heine's bird with the present species, its range must be 

 extended over the whole northern part of South America 

 from east to west. 



3. Thaumatias viridiceps. 



Thaumatias viridiceps, Gould, P. Z. S. 1860, p. 307 ; id. 

 Mon. Troch. v. pi. 295; id. Intr. Mon. Troch. 8vo ed. 

 p. 152. 



Hah. Ecuador, Citado [Buckley). 



This is a very distinct species, and, although bearing a close 

 resemblance to T. milleri, is easily distinguished from it by 

 its much larger size and the long strong bill. It was de- 

 scribed by Mr. Gould (/. c.) from specimens received from 

 Quito. Its exact range in Ecuador has not been ascertained. 



4. Thaumatias milleri. 



Trochilus milleri, Bourc. P. Z. S. 1847, p. 43. 



Thaumatias milleri, Gould, Mon. Troch. v. pi. 296; id. 

 Intr. Mon. Troch. 8vo ed. p. 152. 



Hab. Columbia. 



This species, a diminutive form of T. viridiceps, was described 

 by Bourcier [l. c.) from a specimen in the collection of the late 

 Mr. Loddiges. In the examples before me, belonging to my 

 own collection, there is a great difference in the colour of the 

 tail, which in some is greenish grey, like that of T.viridiceps, 

 in others is bronze-red. Four specimens have the tails, and 



