Mr. D. G. Elliot on some Trochilidse. 5 



narrowest on the flanks and crissumj where they are very 

 distant. Wing 6'50 inches, tail 6*30, culmen -60, tarsus 230, 

 middle toe 120. 



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 difi'er essentially in having 

 the tail shorter than the wing, instead of longer, and to be 

 crossed by much fewer (two instead of three or foui-) 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 ha\dng 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 o/ Trochilidse /rom the 

 Museums of Neuchdtel and Florence. By D. G. Elliot, 

 F.R.S.E., F.L.S., &c. 



The receipt of three of Tschudi^s 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)insectivo7'us, Tschudi, Fauna Peruana, 

 p. 248, t. 28. f. 1. 



Bourcieria insectivora, Gould, lutr. Troch. p. 135, sp. 278. 



Hab. Peru. 



In the ' 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, mitil lately, no other specimens than 

 those obtained by Tschudi have reached us, naturalists have 



