Mr. D. G. Elliot on some Trochilidse. 
5 
narrowest on the flanks and crissum, where they are very 
distant. Wing 6*50 inches, tail 6*30, culmen *60, tarsus 2*30, 
middle toe F20. 
Remarks, At first sight this species has a very close re¬ 
semblance to the plumbeous phase of M. guerilla; but upon 
a close comparison it is found to differ essentially in having 
the tail shorter than the wing, instead of longer, and to be 
crossed by much fewer (two instead of three or four) light 
bars. With respect to the shortness of the tail, it agrees with 
M. concentricus; but that species differs (not only from this, 
but all others of the genus) in having the lateral toes of nearly 
equal length, the outer, if either, being the shorter, and also 
in having the crissum unbarred white. M. mirandollii , one 
of the large species, alone agrees with the present bird in 
having the tail shorter than the wing, and, at the same time, 
the outer toe longer than the inner. 
II.— Remarks on some Type Specimens of Trochilidse from the 
Museums of Neuchdtel and Florence . By D. G. Elliot, 
F.R.S.E., F.L.S., &c. 
The receipt of three of TschudFs types from the Museum of 
Neuchatel, through the kindness of M. Coulon, the director, 
has given me an opportunity of making several comparisons, 
the results of which may not perhaps be uninteresting to 
ornithologists. 
Bourcieria insectivora. 
Trochilus (. Lampornis)insectivorus , Tschudi, Fauna Peruana, 
p. 248, t. 28. f. 1. 
Bourcieria insectivora , Gould, Intr. Troch. p. 135, sp. 278. 
Hab. Peru. 
In the f Fauna Peruana/ Tschudi described and figured a 
Humming-bird obtained by him between Huari and Chaga- 
cancha, at a height of 14,600 feet above the sea, in Peru, as 
Trochilus insectivorus . It was evidently either a young bird 
or a female; and as, until lately, no other specimens than 
those obtained by Tschudi have reached us, naturalists have 
