(WHITE-THROATED HUMMING-BIRD.)
+Leucochloris albicollis+, _Gould, Mon. Troch._ v. pl. 291; _Elliot,
Syn. Troch._ p. 200. +Thaumatias albicollis+, _Burm. La-Plata
Reise_, ii. p. 448 (Tucuman).
_Description._--Head, all the upper surface, wing-coverts, chin and
sides of the neck, abdomen and flanks deep shining grass-green; on
the centre of throat and breast a large patch of white; lower part
of abdomen and under tail-coverts white; wings purplish brown; two
middle tail-feathers deep shining grass-green, the remainder bluish
black, the three outer ones tipped with white; upper mandible black;
basal two thirds of the lower mandible fleshy, apical third brown;
feet brown: whole length 4·2 inches, wing 2·3, tail 1·4. _Female_
similar.
_Hab._ S.E. Brazil, Paraguay, and N. Argentina.
Dr. Burmeister states that this species is found near Tucuman in company
with _Calliperidia furcifera_ and _Petasophora serrirostris_; but we
have no other authority for its occurrence within the limits of the
Argentine Republic.