Genera of Humming Birds. 99 



white, washed with green. Breast, abdomen, and undertail- 

 coverts rufous. Flanks golden green. Central rectrices shin- 

 ing green ; lateral bluish-black on inner webs, the rest and 

 tips shining green, outermost ones, bluish-black tipped white. 



Total length, 4in. Wing, 2. Tail, i^. Culmen, \. 



This beautiful species was discovered in Bolivia, by Buckley 

 in 1874. 



■^136. Cyanolesbia griseiventris, Tacz. P.Z.S., 1883, p. 72. 



Gray bellied. Train-bearer, Gould, Mon. Troch., Suppl. p. 

 56. 



Le Cynantlie du Per on. 



Habitat. — Peru. 



Upperside green, with the forehead scaly for a long distance 

 and very brilliant. Underside entirely pale ashv-gray. Throat 

 bright blue, the feathers white at the base, vent white, wing- 

 coverts uniform with the back, the edge of the wing white, first 

 primary externally margined with white. Tail deeply forked, 

 brilliant green, the median rectrices with a broad apical lustre 

 of reddish copper, outermost bluish-black with green tips. 

 Tail underside bluish-green. Bill black. 



Length of wing, 81 mill. Tail, 90. Culmen, 25. 



This species was discovered in Peru, by Mr. Jelsky. 



Genus XLVII. Neolesbia, Salvin, Cat. Birds, 1892. p. 145. 

 Cyanolesbia, Berlepsch, J. fur Ornith., 1887, p. 326. 



Bill short and straight, slightly decurved. Tail long and 

 deeply forked. Rectrices wide, dark steel blue. 



Type : Cyanolesbia nerkhorni , Berl. J. fur Ornith., 1887, p. 326. 



Habitat. — Columbia. 



■5^137. Neolesbia NERKHOR.NI, Berlepsch, Berch, eines, Neuen. 

 Colib., Zeiftr fur Ornith., 1887, p. 178. 



Nerkhorns Blue-failed Sylph. 



le Cynanthe de Nerkhorn. 



Habitat. — Columbia. 



J/^7/^.— Head metallic blue. Upperside shining greenish 

 blue. Throat metallic green with bluish reflections.' Breast 



