(WHITE-SIDED HUMMING-BIRD.)
+Oreotrochilus leucopleurus+, _Scl. et Salv. Nomencl._ p. 81; _White,
P. Z. S._ 1882, p. 615 (Catamarca); _Elliot, Syn. Troch._ p. 36;
_Gould, Mon. Troch._ ii. pl. 71.
_Description._--Head, upper surface, and wings greyish olive-brown,
passing into dull coppery green on the upper tail-coverts; two
central tail-feathers and outer one bronzy green, the others white,
narrowly edged externally with brown; throat shining green, bordered
below by a band of black with bluish reflexions; flanks olive-brown;
breast and sides of belly white; centre of belly black with
steel-blue reflexions; under tail-coverts olive: whole length 5·0
inches, wings 2·7, tail 2·1. _Female_ above like male; beneath
white, throat densely spotted with brown; flanks brownish.
_Hab._ Chili and Northern Argentina.
White obtained a single specimen of this Humming-bird in September 1880,
at Fuerte de Andalgala, in Catamarca. It is a well-known species in
Chili, where, according to Gould, "it inhabits the sheltered valleys of
the Andes, just below the line of perpetual congelation."