g8 Genera of Humming Birds. 



Green-tailed Sylph, Gould. Mon. Troch., vol. iii., p. 172. 



Le Cynanthe mocoa , Muls., Hist. Nat., Ois. Mouch., 1876, 

 t. iii., p. 272. 



Habitat. — Ecuador, Peru. 



Male. — Crown brilliant metallic-green, llpperside shining 

 bronze-green, greenish on lower part. Uppertail-coverts shin- 

 ing green. Basal halt of the two median rectrices bluish- 

 black, remaining portion brilliant metallic green, the next two 

 are bluish-black four-fifths of their length, with outer webs 

 and tips metallic green; the outermost ones are black for two- 

 thirds of their length, remaining portion brilliant metallic- 

 green. A metallic blue spot on throat. Wings purplish 

 Ijrown. Bill and feet black. 



Total length, 7iin. Wing, 2\. Tail, 5. Culmen, i^. 



Female. — Like the preceding species with throat and breast 

 white, the first spotted with bronze-green feathers, and rest of 

 underside rufous. 



This magnificent species was discovered by Delattre, near 

 Mocoa, Ecuador. 



I have several adult specimens receixed from Bogota, which 

 differ by the colour of the crown, which is golden-green, and 

 the upperside is of a lighter green. The throat is brownish 

 golden-green without any blue at all. If ii should prove a 

 distinct species, I propose the name of C" col umbiana for it. 



135. CVANOLESBI.A BOLIVIANA, Gould, Mon. Troch., Suppl., 



P-57- 



Boliviaji Svlph, Gould, Mon. Troch, Suppl., p. 57. 



Le Cynanthe de Bol ivic, 



Habitat. — Bolivia. 

 • Male. — Crown most brilliant golden-green. Upperside 

 golden-green, with dark reflections. Rump and uppertail- 

 coverts shining green. Tail like C mocoa, but shorter, and all 

 the rectrices wider, the metallic green of tips has a bluish 

 reflection on inner webs. Centre of throat metallic steel-blue, 

 with greenish reflections, rest of undersidt- golden. Wings 

 purple-brown. Bill and feet black. 



Total length, 6-\in. Wing, 2%. Tail, 4..I. Culmen, ^. 



Female. — Crown shining green. Upperside golden bronze, 

 passing to green on the rump and uppertail-coverts. Throat 



