Genera of Humming Birds. 239 



chestnut, edged and tipped with brownish-black. Underside 

 jet-black, with the exception of a tuft of pure white feathers 

 on the breast. Undertail-coverts chestnut. Wings dark 

 bronze-green, excepting the primaries which are purplish- 

 brown. Shaft of first primary, from base to half its length, 

 -dark chestnut. Bill black. 



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



Female. — Exactly like the male, but not so bright, the 

 black of upper and underside inclining to brownish-black, the 

 luminous colour of lower part of back and uppertail-coverts is 

 not quite so bright as in the male, and not so green. There 

 is a bronzy tinge on each side of shaft of the median rectrices. 



This handsome and rare species was discovered in Bolivia, 

 by Mr. Alcide d'Orbigny. 



I have a fine series collected in Bolivia, by Buckley in 1874. 



Genus XCVI. Lafresnaya, Bon., Compt. Rend., 1850, 



p. 380. 



Calothorax, Gray, Gen. Birds, 1848, vol. i., p. no. 



Entima, Cab. and Hein., Mus. Hein., i860, t. iii., p. 51. 



EUCLOSIA, Muls. and Verr., Class. Trochil, 1865, p. 63. 



Type : T.Jlavïcaudata, Fraser. 



Bill narrow, long, curved, much longer than the head. 

 Wings long, pointed, reaching the end of tail, primaries 

 curving inwardly, outer web on the first hardly perceptible, 

 inner webs very narrow. Tail slightly forked in the males. 

 Rectrices pointed, outermost ones longer than the rest. 

 Undertail-coverts reaching two thirds the length of rectrices. 

 Feet moderate. Tarsi clothed. Sexes different in plumage. 



Habitat. — Venezuela, Colombia, and Ecuador. 



339. Lafresnaya flavicaudata. Fraser, P.Z.S., 1840, 



p. 18. 



Trochilus lafresnayi, Boissonneau, Rev. Zool., 1840, p. 8. 



Calothorax lafresnayi, Gray, Gen. Birds, vol. i., p. no. 



Entima lafresnayi, Cab. and Hein., Mus. Hein., i860, 

 t. iii., p. 51. 



Euclosia lafresnaya, Muls., Hist. Nat. Ois. Mou., 1876, 

 vol. ii., p. 187. 



