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CHLOROSTILBON OsBERTI, Gould. 
Crowm of the head glittering golden-green; throat and all the 
under surface glittering grass-green ; wing purplish-black ; tail black, 
the six centre feathers terminated with a mark of brown, which is 
more conspicuous in some specimens than in others; in some also the 
two central feathers are tipped with green ; bill coral-red at the base, 
black at the tip. 
Total length 24 inches ; bill 4; wing 14; tail 14. 
Hab. Guatemala. 
Remark.—This species, which I have named after Mr. Osbert 
Salvin, and which is an inhabitant of the neighbourhood of Duefias 
and some other parts of Guatemala, has been a great puzzle to me, as 
it must be to every Trochilidist who studies the little green Hum- 
ming Birds to which the generic name of Chlorostilbon has been ap- 
plied. It is, in fact, a diminutive C. caniveti, but too diminutive to 
be regarded in any other light than in that of a species. 
In naming this bird after Mr. Osbert Salvin, I feel that a finer 
species might have been more appropriately dedicated to him; for 
there is no person of his youthful age who has exerted himself so 
praiseworthily or so successfully in collecting facts and specimens of 
ornithology. Mr. Salvin has already traversed a great part of the 
country of Central America, and has also paid a hurried visit to 
North Africa, and collected in both countries an immense mass of 
materials in every department of zoology, which he has liberally 
placed at the disposal of those who have devoted themselves to the 
several departments to which they pertain. 
CaLOTHORAX DECORATUS, Gould. 
Male.—Crown of the head, all the upper surface and flanks deep 
grass-green ; throat and sides of the neck very lovely shining lilac ; 
chest grey ; wings and tail purplish-brown ; bill black. 
Total length 3 inches ; bill 2; wing 13; tail 3. 
Hab. Supposed to be Antioqua in Columbia. 
Remark.—This species might easily be mistaken for Calothorax 
heliodori; but although closely allied to that species, it differs 
from it in several particulars,—in being much larger, in having the 
frill in front of the throat not so prolonged at the sides (in which 
respect it more nearly resembles C. mulsanti), the two centre tail- 
feathers finer or more spiny, and the bill much longer. These com- 
parisons have been made with fine specimens in my collection of all 
three species. 
AMAZILIA ALTICOLA, Gould. 
Crown of the head and back of the neck dark brown, with very 
slight reflexions of golden-green ; back of the neck, back, and rump 
golden- or orange-green ; upper part of the throat, cheeks, and sides 
of the neck light golden-green ; lower part of the throat, chest, 
centre of the abdomen, thighs, and the thickly clothed tarsi pure 
white ; flanks rich bright buff ; under tail-coverts white washed with 
buff ; tail rich deep reddish-buff, the two centre feathers washed with 
