(GOLDEN-TAILED HUMMING-BIRD.)
+Chrysuronia ruficollis+, _Berlepsch, J. f. O._ 1887, p. 18.
+Chrysuronia chrysura+, _Scl. et Salv. Nomencl._ p. 93; _Elliot,
Syn. Troch._ p. 169 (Arg. rep.), _Gould, Monogr. Troch._ v. pl.
329.
_Description._--Head, all the upper surface, wings, and tail-coverts
of a golden hue, inclining to brown on the head; wings purplish
brown; tail of a very rich golden lustre both above and beneath;
chin buff; under surface grey, washed with a golden hue, which is
richest on the flanks; vent and thighs white; under tail-coverts
grey, with a slight golden lustre; bill fleshy, red at the base of
both mandibles and dark at the tip; feet brown: whole length 4·2
inches, wing 2·2, tail 1·2. _Female_ similar.
_Hab._ S. Brazil, Paraguay, and N. Argentina.
Hans v. Berlepsch has lately shown that Azara described this species
under the designation "_Picaflor cola de topacio_," and that it must
consequently bear the name _ruficollis_ of Vieillot, instead of
_chrysura_ of Lesson, by which it is more commonly known. It visits the
more northern portion of the Argentine Republic, and was obtained in the
vicinity of Buenos Ayres by Hudson at Conchitas, and by Durnford at
Punta Lara. The British Museum contains specimens from both these
localities.