(WHITE-BREASTED HUMMING-BIRD.)
+Leucippus chionogaster+, _Scl. et Salv. Nomencl._ p. 91; _White, P.
Z. S._ 1882, p. 616 (Catamarca); _Elliot, Syn. Troch._ p. 199;
_Gould, Mon. Troch._ v. pl. 290.
_Description._--Head, upper surface, wing-coverts, and flanks bronzy
green; throat and whole lower surface white; wings purplish brown;
central tail-feathers bronzy green, lateral dull bronzy brown on the
outer webs; inner webs and shafts white, the inner webs clouded with
bronzy brown in the centre; bill black, lower mandible paler at the
base: whole length 4·2 inches, wing 2·1, tail 1·3. _Female_ similar.
_Hab._ Peru, Bolivia, and Northern Argentina.
White obtained examples of this species at Fuerte de Andalgala, in
Catamarca, in September 1880. They were feeding on the flowers of
the "Idiondilla," which is one of the "Humming-bird-plants" of that
district. "They are very swift and wild in their movements," he tells
us, and "make a very loud hum," louder in fact than any other species
with which he was acquainted.