139 



BLUE.GREEN HUMMING-BIRD. 



Trochilus cyaneus. VIBLLLOT. 



PLATE VII. 



Oiseau-mouche verazur, Omismya cyanea, Lesson, Histoire 

 Naturette des Oiseaux-mouches, pi. Ixxi. p. 199. 



THIS species was discovered in Brasil, by MM. 

 Langsdorff and Delalande, and, according to Lesson, 

 was first described by Vieillot, in 1818. It is of 

 small size, being scarcely three inches in length, in- 

 cluding the bill and tail. The bill is of a clear yellow, 

 brownish at the tip, slightly dilated at the base ; the 

 crown is of a dull green, changing with the light to 

 a pure and brilliant blue ; the throat is a mixture of 

 grayish and rich ultramarine blue, according to the 

 position, and in the centre has the pnimes of a scaly 

 form and of a brighter hue ; the neck, back, and lesser 

 wing-coverts, are of a golden green ; the rump and 

 tail-coverts green, with reddish or bronze reflections ; 

 the wings, equal in length to the tail, are narrow, 

 and of a purplish black ; the tail is slightly forked, 

 and of a uniform steel blue ; the breast green, or clear 

 blue, according to the position, changing to brownish 



