312 Mr. D. G. Elliot on the Trocliilidje. 



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. quadrtcolor. 



b. Tail bronzy red ; top of head metallic purple, 



sometimes with blue reflections C. violiceps. 



e. Tail metallic golden, tip bronzy red ; top of head 



dull metallic dark green C. viridifrons. 



B. Breast and abdomen white ; flanks metallic green 



or bronze. 



d. Under tail-coverts greenish grey C. cyanocephala. 



e. Under tail-coverts bronzy red C. mia-orhyncha, 



f. Under tail-coverts white ; top of head blue .... C. francice. 



g. Under tail-coverts white ; top of head and nape 



blue C. cyaneicollis. 



On looking at the geographical distribution of the members 

 of this genus, we find that Mexico contains four species, viz. C. 

 quadricolor, inhabiting the northern part, C. violicep an«d 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. francicB to be a native of Columbia, whUe Peru is 

 given as the habitat of the form described by Mr. Gould as C. 

 cyaneicollis. No member 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. Meth. p. 132, pi. 17. 



Cyanomyia quadricolor, Bp. Rev. et Mag. Zool. 1854, p. 



