148 GENEBA AND SPECIES. 



the first four quill feathers, especially the first 

 and second, remarkably dilated. Female dusky 

 below, with a tinge of green on the throat. In 

 Gould's cabinet. Rare. 



Locality : Jamaica ? 



Campylopterus Pampa, Less. Crown, in a 

 line above the eye, azure blue ; upper part of 

 the body green; under parts pale grey; tail, 

 wedge-shaped, green; the outer tail-feathers 

 dark at the tips. 



Locality: Paraguay. 



In the genus Campylopterus, the powers of 

 flight are extraordinarily developed, but the 

 flight is not like that of a butterfly or a bee, 

 the wings do not perform a succession of such 

 rapid vibrations, as to render them scarcely 

 visible, but winnow the air with more measured, 

 yet vigorous strokes, as we see in the case of 

 the Swift ; thus they dash along the surface of 

 rivers or marshes, or wheel around the trees, the 

 blossoms of which attract them. Evening is 

 their favourite hour of disport. 



Grenus LAMPOBNIS. 



In this genus the beak is gently arched and 

 long; the wings are rigid and adapted for 

 powerful flight ; the tail is ample, and the tarsi 

 small. Of this genus the Trochilus Mango, 

 (Mango Humming- Bird) is an example. See 

 Naturalist's Lib. Ornith. vol. ii. p. 100, pi. 20. 

 *' For what reason Linnaeus applied the trivial 



