34 



SYNOPSIS OF THE HUMMING-BIRDS. 



Tail steel-black. Bill black. Total length, 4 in. Wing, 2f in. Tail, If in. 

 Culmen, j in. 



Female. Upper parts grass-green. White line behind the eye. Auriculars black. 

 Entire under parts reddish-buff. Median rectrices bronze-green. Lateral ones 

 bronze-green at base graduating into black, with white tips. Bill black. 



3. Oreopyra cinereicauda. 



Oreopyra cinereicauda, Latvk., Ann. N. Y. Ljc. Nat. Hist., vol. viii, p. 48.'), vol. ix, p. 125. 

 Oreopyra caslaneiventris, Lawr., Ann. N. Y. Lye. Nat. Hist., vol. ix, p. 124 (partim). 



ITab. Costa Rica. 



Male. This species differs from 0. leucaspis in the coloring of the tail, which is 

 ashy-white. The under tail coverts are also paler. The bill is also longer. Total 

 length, 4j in. Wing, 2| in. Tail, 1| in. Culmen, | in. 



The female is exactly like that of 0. leucaspis, but has a longer bill. 



The next genus is composed of species remarkable for their coloration, and the 

 high elevations at which they live. They are robust birds, the majority nearly 

 pure white beneath, and all possessing brilliant throats. The sexes are very 

 different in coloration, and the females of two of the species are so much alike that 

 it is impossible to distinguish them apart, rendering it absolutely necessary tliat their 

 correct locahties should be given, to enable the birds to be satisfactorily determined. 



Genus XY.— OREOTROCHILUS. 



Or eotro chillis, Gould, P. Z. S. (1847), p. 10. 



Or otro chillis. Cab. and Hkin., Mus. Hein. Th., iii, p. 15 (1860). 



Ch. " Bill longer than the head, 

 almost cylindrical, but slightly curved 

 downwards ; wings rather large and 

 powerful ; tail large and rounded, the 

 feathers narrow, rather pointed and 

 rigid ; feet strong, the hind toe and 

 nail about equal in length to the 

 middle toe and nail; tarsi clothed 

 with feathers." (Gould, 1. c.) 



Ranrje. West coast of South 

 America, from Ecuador to Chili, 

 along the Andes at considerable elevations 



Six species are known. 



Ttpe. 

 0. estellce, D'Orb. 

 0. pichincha, Bourc. 



Fig. 15. 



OreotrocJiilus ^ichinclta. d* . Quito. TVhitoly. 



