308 
Remark.—This species, which is somewhat allied to the 7’. milleri, 
differs from that, as well as from every other known member of its 
genus, by the blue colouring of its crown. 
THAUMATIAS NITIDIFRONS, Gould. 
Crown of the head, face, chest, and breast glittering green ; abdo- 
men and flanks golden green; back, shoulders, and rump bronzy- 
green ; tail pale bronzy greyish-green, with a zone of purplish-brown 
crossing the four lateral feathers on each side near their tips; under 
tail-coverts grey, with a patch of bronzy-green in the centre of each ; 
tarsi greyish-brown ; upper mandible black ; under mandible yellow, 
black at the tip. 
Total length 34 inches; bill $; wing 14. 
Hab. Unknown. 
Remark.—Nearly allied to the 7. brevirostris and T. milleri, but 
differing from both in the glittering green of the face and crown, and 
in the centre of the breast being covered with the same shining 
colour. The specimen described was presented to me by G. N. Law- 
rence, Esq., when IJ visited New York in 1858. 
CHLOROSTILBON MELANORHYNCHUS, Gould. 
Bill black ; crown of the head and the entire under surface glit- 
tering golden-green, the golden hue being most. conspicuous on the 
crown ; the back of the neck and upper surface are also golden-green, 
but less brilliant; wings purplish-brown; the short and slightly 
forked tail is greenish or steel-blue ; thighs brown ; anal region, and 
a small tuft springing from each side of the body, white. 
Total length 33 inches ; bill ?; wing 2; tail 11. 
Hab. The neighbourhood of Quito in Eeuador. 
Remark.—Difiers from C. chrysogaster in its black bill, its 
shorter and less forked tail, and in its being a stouter or more robust 
bird, 
CHLOROSTILBON ACUTICAUDUS, Gould. 
Crown and all the under surface glittering green, the green as- 
suming a golden hue on the crown; back, all the upper surface, and 
tail rich golden-green ; wings purplish-brown ; bill black. 
Total length 3 inches; bill 2; wing 12; tail 1. 
Hab. Antioqua in Columbia. 
Remark.—This very distinct species is allied both to Chlorostilbon 
portmanni and C. alicie ; but it differs from the former in the greater 
length of its bill, and from the latter in the greater length of its tail- 
feathers. In the present species, the outer tail-feather on each side 
is prolonged nearly an eighth of an inch beyond the next, which 
again is a little prolonged beyond the centre feathers. When the 
tail is closed, the two outer feathers join at the tip, and form a sharp 
point ; in the two species with which I have compared it, the tail is 
more truncate. 
