INTRODUCTION Ixvii 



165. ACESTRURA DECORATA, Gottld. 



Calothorax decoratus, Gould . .... Vol. III. PI. 146. 



Habitat. Uncertain, but supposed to be Antioquia, in New Granada 



166. AcESTRURA Heliodori. 



Calothorax Heliodori -...•......,. Vol. III. PI. 147. 



Lucifer Heliodori, Reichenb. Troch. Enum. p. 10. 



Chaetocercus Heliodori, Cab. et Hein. Mus. Hein. Theil iii. p. 60. 



Calothorax bombilus, Reichenb. MS. 



Habitat, The Andes of New Granada. 



167. Acestrura micrura, Gould. 



Calothorax micrurus, Gould Vol. III. PI. 148. 



Habitat. Peru or Bolivia. 



The members of the genus Acestrura naturally lead on to the Calothorax Roscb and C. Jourdani, constituting the 



Genus Ch^tocercus, G. R. Gray. 



Both these birds have very singularly formed tails, as may be seen on reference to the respective plates on 

 which they are represented. 



168. Chaetocercus Ros^. 



Calothorax Rosse . , . Vol. III. PI. 149. 



Chaetocercus Rosae, Cab. et Hein. Mus. Hein. Theil iii. p. 60. 

 Habitat. Venezuela. 



169. Ch^tocercus Jourdani. 



Calothorax Jourdani Vol. III. PI. 150. 



Habitat. The Island of Trinidad, where Mr. Tucker states that it frequents the Savannahs, but is very rare. 



The bird which I have figured under the name of Calothorax Fanny is the type of the 



Genus Myrtis, Reic/ienb,, 



which I adopt for that beautiful bird and the C. Yarrelli, as I consider them to be a very distinct form, and one 

 which is especially remarkable for the structure of the tail. 



170. Myrtis Fannie. 



Calothorax Fanny Vol. III. PI. 151. 



Habitat. Ecuador and Peru. 



Mr. Fraser found it at Cuenca in November, 1857, when it was " common about the gardens and lane hedge- 

 rows. It makes much more humming with its wings than the long-tailed green Lesbia.''—Proc. Zool Soc, part 

 xxvi.p. 459. 



171. Myrtis Yarrelli. 



Calothorax Yarrelli Vol. III. PL 1 52. 



Habitat. Western Peru, particularly the neighbourhood of Arica. 



How very singular and diversified in form are the Humming-Birds of Peru ! So varied indeed are they, that 

 almost every species demands a generic appellation ; the T. Corce with its beautiful throat and lengthened tail is the 

 type of the 



Genus Thaumastura, Bonap. 



Of this pecuUar form only one species is known, of which the male alone is decorated with fine colours, and 

 bears the singularly constructed tail. 



172. Thaumastura Cor^ Vol. IIL PI. 153. 



Ornismya cora, Dev. Rev. et Mag. de Zool. 1852, p. 217. 



Habitat. Peru. 



M. Deville states that this bird is found during the months of February, March, April, and May only, in the 



