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Mr. D. G. Elliot on the Trochilidse. 
Heliotrypha. 
Having lately obtained for my collection the type of Helio- 
trypha barrali, Mulsant & Verreaux, a species unknown save 
by the description published in 1868 by those gentlemen, I 
was led to examine its relations to the other known species 
of the genus, with the results now given. 
The genus Heliotrypha is closely allied to Heliangelus; 
indeed at one time the species of both were placed under 
the latter term, until Mr. Gould, in his monograph of the 
family, very properly separated the two species H. viola and 
H. parzudakii (as given by him, exortis , as it should be called) 
under the generic name by which they are now known. They 
differ from the species of Heliangelus conspicuously in not 
possessing any trace of the white or buff band beneath the 
metallic feathers of the throat. 
The species have but a limited geographical distribution, 
being confined to districts of Columbia and Ecuador lying 
on the west of the Andes. The first of these contains H. bar - 
rail, from the river Saldana, the only locality in which it has 
been found, so far as known at present, and H. exortis, which 
is plentiful in the vicinity of Bogota, and also extends its 
range into Ecuador, where it has been obtained near Popayan 
and near Quito. H. viola has, as yet, only been obtained in 
Ecuador. The following table will serve to distinguish the 
species, which compose but one group, easily recognizable 
by their differently coloured throats - 
a. Throat metallic purple ; chin with light-blue reflections. . If. viola. 
b. Throat metallic red; chin deep blue, almost black in some 
lights...... II. exortis. 
c. Throat pale olive-green .... H. barrali. 
Heliotrypha viola.. 
Heliangelus viola , Gould, P. Z. S. 1853, p. 61. 
Heliotrypha viola, Gould, Mon. Troch. vol. iv. pi. 241; et 
Intr. Troch. p. 131, sp. 266. 
Hab. Ecuador. 
M. Warszewiez was the discoverer of this beautiful species. 
The specimens he brought came into the possession of Mr. 
