"The seat of _P. gigas_ is so firm and close to the branch, that its tiny feet are invisible; the breast is puffed out, and its head in continued motion from one side to the other with a jerky movement. When disturbed it darts off around with a rough jerky flight for a minute or so, and then endeavours to return, but, if still interfered with, seeks a dry twig at the top of some neighbouring tree on which to alight. Its poise when suspended, sipping at the flowers, is heavy and laboured, and the motion of its large wings, although rapid, is perceptible to the eye; and it never remains more than half a minute in this position, when it retires to a branch to rest for at least five minutes, perching, with its head towards the sun and its beak slightly elevated." 235. CALLIPERIDIA FURCIFERA (Shaw). (ANGELA HUMMING-BIRD.) +Calliperidia furcifera+, _Scl. et Salv. Nomencl._ p. 90; _Durnford, Ibis_, 1877, p. 184 (Buenos Ayres). +Heliomaster furcifer+, _White, P. Z. S._ 1882, p. 616 (Catamarca); _Barrows, Auk_, 1884, p. 21 (Entrerios); _Elliot, Syn. Troch._ p. 86. +Ornismya angelæ+, _d'Orb. et Lafr. Syn. Av._ ii. p. 28 (Corrientes). +Calliperidia angelæ+, _Elliot, Ibis_, 1877, p. 137. +Heliomaster angelæ+, _Gould, Mon. Troch._ iv. pl. 263; _Burm. La-Plata Reise_, ii. p. 448; _id. P. Z. S._ 1865, p. 466; _id. Anales Mus. B. A._ i. p. 70. +Campylopterus inornatus+, _Burm. La-Plata Reise_, ii. p. 447. (jr.). _Description._--Crown of head luminous metallic green, changing in some lights to aquamarine, in others to bluish green, and in others to golden green; all the upper surface and wing-coverts golden green, the golden hue predominating on the lower part of the back; wings purplish brown; tail purplish black, glossed with dark green; behind the eye a spot of white, and on the cheeks a streak of grey; centre of throat rich metallic purplish crimson, on each side of which is a series of elongated feathers of a rich deep metallic blue; under surface deep green, passing into rich blue on the middle of the body; tuft on each side and vent white; under tail-coverts green, fringed with white; bill black; feet blackish brown: whole length 5·2 inches, wing 2·3, tail 1·7. _Female_: the whole of the upper surface golden bronze, inclining to grey on the crown; tail green, deepening into black towards the extremity, and a spot of white at the tip of the three outer feathers of each side; wings purplish brown; under surface grey, fading into white on the throat and middle of belly. _Hab._ S. Brazil, Paraguay, and Argentina.