Mr. D. G. Elliot on the Trochilidse. 51 



Bogota. From this last locality Mr. Gould has received 

 specimens presenting no differences from eastern examples, 

 save a trifling increase in the length of the bill and a slight 

 tipping of white to the tail-feathers. T. tobaci can be recog- 

 nized from its near ally, T. tephrocephalus , by the colour 

 of its tail, the lateral feathers of which are black, with 

 pale tips. 



14. Thaumatias fluviatilis. 



Thaumatias fluviatilis, Gould, Intr. Mon. Troch. 8vo ed. 

 p. 154. 



Hab. Rio Napo, Pebas, Peru. 



This rather rare species was described by Mr. Gould as 

 above from specimens obtained on the Rio Napo. It has 

 also been procured at Pebas by Mr. Hauxwell. It difi'ers 

 from its near relatives in the deep grass-green, with a slight 

 bluish tinge, of its under surface (deeper in colour even than 

 in T. nigricauda, although of a similar shade) , also in the under 

 tail-coverts, which are brown, margined with white. It is 

 apparently not uncommon in the localities it frequents. 



15. Thaumatias apicalis. 



Thaumatias apicalis, Gould, Intr. Mon. Troch. 8vo ed. 

 p. 154. 



Hab. Columbia. 



This appears to be a rare species. I have only seen the 

 specimens contained in Mr. Gould^s collection and my own. 

 It has a very long bill, and the tail is similar to that of the 

 bird I have called T. nigricauda ; but the median feathers are 

 bright green for two thirds their length, and then black. 

 Mr. Gould states that the under tail-coverts are pure white. 

 When together they appear so, but on separating them it is 

 perceived that their centres are blackish brown, the remaining 

 portions being white. 



16. Thaumatias maculicauda. 



Thaumatias maculicauda, Gould, Intr. Mon. Troch. 8vo ed. 

 p. 154. 



Hab. British Guiana. 



Mr. Gould has, with his usual kindness, placed in my hands, 



£ 2 



