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DOUBLE-CRESTED HUMMING-BIRD. 
Trochilus cornutus. — Neuwied. 
Plate XXI. Male. 
Trochilus cornutus, Neuwied Voyage au Brtsil. — Trochilus bilo- 
phus, Temminck, Planches Coloriees, xviii. fig. 3 Oisean- 
mouche aux Huppes d’or, Omismya chrysolopha. Lesson, His. 
toire Naturelle des Oiseaux-mouches, pi. vii. p. 55. 
The discovery of this most splendid species is due 
to the Prince Maximilian de Wied-Neuwied, who 
described it, in his'“ Voyage to Brasil," under the 
name of T. cornutus, and furnished the specimens 
from which M. Temminck made the drawings for his 
PI. Coloriees. It inhabits the exalted Campos-Geraes 
of Brasil, near the sources of the river Don Francisco. 
This humming-bird is about four inches in length, 
of which the tail alone measures nearly the half; the 
bill and feet are remarkably slender, the former slightly 
bent, terminating in a very fine point. The most 
characteristic mark of this species is the two flattened 
crests, composed of six feathers, which divide in front 
of the head, on a level with the eyes, and are directed 
forwards. Lesson, describing them, says, “ Ces deux 
