Type Specimens of Trochilide. 9 
many names by different authors. The specimens with white 
spots in the tail, which may possibly be females, were named 
by Mr. Gould ZL. hypoleucus; but this has been placed as a 
synonym of ‘T'schudi’s appellation by that naturalist. Re- 
cently Mr. Buckley has brought specimens from Bolivia, 
which, on comparison with Tschudi’s type, are found to be 
the same. This genus, therefore, will consist only of two 
species*, the present and the ZL. chlorocercus, Gould, de- 
scribed in the ‘ Proceedings’ of the Zoological Society for 
1866, p. 194, which differs chiefly in having the throat spot- 
ted with brown, instead of being pure white. Tschudi’s bird 
was first described as 7. leucogaster (loc. cit.), a name after- 
wards altered to T. chionogaster in the ‘ Fauna Peruana;’ 
the name first applied must, of course, be the one adopted. 
In the year 1865, in the ‘ Annals’ of the Florence Mu- 
seum, Sig. Benvenuti described four species of Humming- 
birds, coming from New Granada, as new. ‘The descriptions 
given, and the comparisons made, did not indicate them as 
belonging to unknown forms; but it was impossible to deter- 
mine their real specific value without having access to the 
examples themselves. Having requested Dr. Giglioli to for- 
ward the types to me, he most kindly sent three of them (all 
that were in the museum); and I am now able to determine 
* In the P.Z.S. for 1874, M. Taczanowski described a specimen of 
Leucippus as L. pallidus, from Peru, differing from L. leucogaster in being 
slightly larger, and having a “nuance grisdtre” on the back and head. 
This is undoubtedly “ Trochilus turnert,’ Bourcier (Revue Zoologique 
1846, p. 313), the type of which is in my collection, and which is cha- 
racterized in his description as having “la téte, cou, dos, couvertures 
alaires et caudales vert grisdtre luisant.” This haslong since been placed 
among the synonyms of L. leucogaster, as being simply a phase of plu- 
mage that is met with in nearly every group of the Trochilide, where 
specimens are found that exhibit a colour slightly at variance with 
the typical style, as, for instance, yellowish green, or, as in this case, 
greyish green, instead of pure green. These differences, however, like 
those of slight variations in length of bill, wings, or tail, have no specific 
value. I have therefore placed Z. pallidus among the synonyms of 
L. leucogaster ; for it does not seem to be at all necessary to elevate Z. 
turneri ‘into a separate species, of which LZ. pallidus of Taczanowski 
would certainly be a synonym. 

