222 CONCLUDING OBSERVATIONS. 



is short, dusky, and but little forked, when 

 closed it might even be called rounded. 



Locality : Columbia. In G-ould's cabinet. 

 Trochilus (Gouldia) Conversi, Bourcier, 1846. 

 Plate XIV. 



Male: green, with a white rump - bar ; tail- 

 feathers long, narrow, pointed, glossy black, 

 with white shafts. The female differs greatly 

 from the male ; the tail is forked, but is com- 

 posed of rounded feathers, of which the third on 

 each side is the longest ; each feather is dusky 

 at the base and tip, the latter shewing a spot of 

 white ; head and throat dusky ; general plumage 

 green, with a white rump-mark. 



Locality : Santa Fe de Bogota. In Oould's 

 cabinet. 



These birds appear to be swallow-like in their 

 mode of flight, capturing insects on the wing. 

 It was from this circumstance, we believe, that 

 Spix applied the title of Colubri hirundinaceus, to 

 the Trochilus Langsdorfi of Vieillot, described 

 and figured in Aves Brasil, tab. 8, 2. 



Here we conclude our list of G-enera, having 

 selected in illustration of each some of the most 

 typical species which Mr. Grould's magnificent 

 cabinet contains. 



We have given preference to those that are 

 rare, and have been only recently described. Not 

 unfrequently we have had occasion to revert to 

 theNaturalist'sLibrary of Ornithology, the spe- 



