20 HUMMING-BIRDS. 



[Case 53.] 

 CHRYSOLAMPIS. " Rusr and Topaz." 



The single species representing this genus is one of the commonest, 

 and at the same time one of the most beautiful of all the known 

 Humming-birds. It has for years been sent over to Europe in large 

 quantities for the purposes of decoration of ladies' hats and dresses ; 

 and were it not for the extreme abundance of the species it would 

 have been long ago exterminated. It is known at a glance by its 

 ruby crown and golden throat. It ranges over the whole of Brazil, 

 extending through Amazonia into Colombia, and northwards into 

 Guiana and Venezuela. 



[Case 51.] 

 BELLONA. " GiLT-cEESTs." 



In many respects similar to the preceding genus, but recognizable 

 by their well-developed crests. Two species, B. cristata and B. exilis, 

 both inhabiting the West-India islands. 



[Case 54.] 

 CEPHALOLEPIS. " Plover-crests." 



The head is crested, one, sometimes two, feathers being produced 

 beyond the rest to a considerable length. The females lack the crest. 

 Two species are known, confined to South-eastern and Southern Brazil. 



[Case 55.] 

 KLAIS. " " Elutterers." 



Of small size, with long wings and rounded tail; tarsi clothed. 

 They are particularly fond of feeding from the flowers of the Guayava- 

 tree, which blooms nearly aU the year round. The single species 

 known, Klais guimeti, is rather local in its habitat, but distributed from 

 Costa Rica southwards into Yenezuela and Colombia. 



[Case 56.] 

 AGL^ACTIS. " SuK-BEAMs." 



The peculiar coloration of the rump forms one of the principal 

 features in the present genus, for, although this part of the body is 

 brilliantly coloured, it is necessary to look at it from behind towards 

 the head to perceive the iridescence of the feathers. The females have 

 the colouring a little less developed, but are otherwise similar to the 

 males. The primaries or long feathers of the wing are sickle-shaped 

 at the end. Eour species have been described, which are inhabitants 

 of Peru and Bolivia, extending through Ecuador into Colombia. 



