Ixxxviii INTRODUCTION. 



Trochilus lasiopygus, Licht. in Mus. Berlin. 



Heliotryphon Parzudahii, Cab. et Hein. Mus. Hein. Theil iii. p. 74. 



Habitat. New Granada ; and Ecuador, where it is rare. 



266. Heliotrypha viola, Gould ............ Vol. IV. PI. 241. 



Heliangelus viola, Gould. 



Parzudahia viola, Reichenb. Aufz. der Col. p. 12. 



Ramphomicron viola, Id. Troch. Enum. p. 10. 



Heliotryphon viola, Cab. et Hein. Mus. Hein. Theil iii. p. 74. 



Habitat. Ecuador. 



Genus Heliangelus, Gould. 



("HAtoy, sol, et ayyeXo9f angelus.) 

 Generic characters. 



Male,— Bill straight, about the same length as the head, and cylindrical ; wings somewhat powerful ; tail 

 rather round in form and of medium size ; feet moderately strong ; hind toe and nail the same length as the middle 

 toe and nail ; gorget luminous, bounded below by a crescent of white. 



Female, — Destitute of luminous colouring. 



This is perhaps a better-defined genus than any other of those into which the Andean groups of Hummino-- 

 Birds have been divided. Its characteristics are a moderately long bill surmounted by a band of lustrous colour 

 on the forehead, and a deep luminous gorget separated from the general colour of the body by a semicircular band 

 of white. Like the Helianthece and Heliotryphce^ the species of this form range along the Andes on both sides of the 

 equator. 



267. Heliangelus Clarissa Vol. IV. PI. 242. 



Trochilus Clarissa, Reichenb. Troch. Enum. p. 10. 



Heliangelus Clarissce, Cab. et Hein. Mus. Hein. Theil iii. p. 75. 



Anactoria Libussa, Reichenb. Aufz. der Col. p. 12 ; Id. Troch. Enum. p. 10. 



Habitat. The high lands of New Granada. Plentiful in collections from Bogota. 



268. Heliangelus strophianus, Gould Vol IV PI 243 



Trochilus Strophiana, Reichenb. Troch. Enum. p. 10. 

 Habitat. Ecuador. 



269. Heliangelus Spencei -....,.. Vol IV PI 244 



Trochilus Spencei, Reichenb. Troch. Enum. p. 10. 



Habitat. The ranges of Sierra Nevada de Merida in New Granada. 



270. Heliangelus amethysticollis Yq] jy pj 245 



Trochilus amethysticollis, Reichenb. Troch. Enum. p. 10. 

 Habitat. Peru. 



271. Heliangelus Mavors, Gould •••-......, Vol IV PI 246 



Trochilus Mavors, Reichenb. Troch. Enum. p. 10. 



Habitat. The Paramos of Portachuela and Zumbador in New Granada. 



That almost terra incognita, so far at least as its zoological productions are concerned, the Andes of La Paz, 

 has given us, through the researches of M. Warszewicz, one of the most distinct as well as one of the most beautiful 

 forms yet discovered among the Trochihd^. This remaritable bird is the type of my genus Diphlogmia, to which I 

 have since added a second species under the name of D. Aurora, with a mark of reservation in case it may prove 

 to be the female of D. Iris ; for the present, however, I regard it as distinct. 



Genus Diphlog^na, Gould. 



(Sf, duplex, et ^Xiyaivos, flammeus.) 

 Generic characters. 



Male.— BUI straight and longer than the head ; wings very long and pointed ; tail lengthened and deeply forked ; 



