312 Mr. D. G. Elhot on the Trochilide. 
section. The following table will show the characters of the 
species :— 
A. Entire underparts pure white. 
a. Tail olive-green ; top of head metallic blue, some- 

times With purple reflections .............. C. quadricolor, 
b. Tail bronzy red; top of head metallic purple, 
sometimes with blue reflections ............ C. violiceps. 
ce. Tail metallic golden, tip bronzy red; top of head 
dull metallic darks green, ~.a.4+ pada. « ac stent C. viridifrons. 
B. Breast and abdomen white; flanks metallic green 
or bronze. 
d. Under tail-coverts greenish grey.............. C. eyanocephala. 
e. Under tail-coverts bronzy red ..........-00065 C. microrhyncha. 
fF. Under tail-coverts white; top of head blue .... C. francia. 
g. Under tail-coverts white; top of head and nape 
DG isy. age ie ees ue pata see eee pee C. cyaneicollis. 
On looking at the geographical distribution of the members 
of this genys, we find that Mexico contains four species, viz. C. 
quadricolor, inhabiting the northern part, C. violicep ansd C. 
viridifrons, the western, and C. cyanocephala, the southern, this 
last species extending its range into Guatemala and Honduras. 
The last-named country is also stated to be the habitat 
of the bird I describe in this paper as C. microrhyncha, 
though I am not certain that this is the correct locality from | 
which the unique example in my collection’came. As we 
proceed. southwards along the western side of South America, 
we find C. francie to be a native of Columbia, while Peru is 
given as the habitat of the form described by Mr. Gould as C. 
cyaneicollis. Nomember of this genus has yet been met with 
in Ecuador, so far as I am aware, though it cannot be supposed, 
if it is represented in both Columbia and Peru, that there is no 
species of Cyanomyia dwelling in the country that lies be- 
tween these two. In no locality east of the Andean range 
has any species of this group been found; and Lesson was in 
error when he gave Brazil as the habitat of C. cyanocephala. 
CYANOMYIA QUADRICOLOR. 
Trochilus quadricolor, Vieill. Enc. Méth. p. 182, pl. 17. 
Cyanomyia quadricolor, Bp. Rev. et Mag. Zool. 1854, p. 



