The members of the genus Acestrura naturally lead on to the Calothorax Rosæ and C. Jourdani, constituting the genus Chætocercus.
Both these birds have very singularly formed tails, as may be seen on reference to the respective plates on which they are represented.
Chætocercus Rosæ
Habitat: Venezuela
Plate 149 Calothorax Rosæ Crimson-throated Wood-StarChætocercus Jourdani
Habitat: The Island of Trinidad, where Mr. Tucker states that it frequents the chainae but is very rare.
Plate 150 Calothorax Jourdani Jourdan’s Wood-starFeaturing all 422 illustrated species from John Gould’s A Monograph of the Trochilidæ, or Family of Humming-Birds arranged by color.