Genera of Humming Birds. 241 



gray, with bronzy tips on medians and purplish-black tips on 

 laterals. Underside rufous with sides of breast and abdomen 

 grayish-white. Undertail-coverts rufous with pale golden- 

 green in centre. Wings purplish-brown. Bill black. 



Total length, 44in. Wing, i|. Tail, i|. Culmen, i. 



Type unique in my Collection. 



Count Berlepsch thinks that it is only an accidental variety 

 of L. flavicaudata. 



341. Lafresnaya gayi, Bourc. and Muls., Ann. Soc. Agri, 



Lyon., 1846, p. 325. 



Trochiius saulae, Bourc. and Delatt., Rev. Zool., 1846,. 

 p. 309. 



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



Lafresnaya saulae, Bon., Consp. Gen. Av., vol. i., p. 68. 



Entinia gayi, Cab. and Hein., Mus. Hein., i860, t. iii., p. 51, 



Euclosia gayi, Muls., Hist. Nat. Ois. Mou., 1876, vol. ii.,. 

 p. 190. 



White-tailed Velvet-breast, Gould, Mon. Troch., vol. ii.^ 

 p. 86. 



/ Enclosie de Gay, Muls. Hist. Nat. Ois. Mou., 1876, vol. ii., 

 p. 190. 



Habitat. — Veuezuela and Ecuador. 



Male. — Upperside shining dark green, sometimes with a 

 golden tinge. Median rectrices shining bronze-green. Laterals 

 white with bronze tips, outermost ones white, margined on upper 

 half of external web, and tipped with purplish-brown, some- 

 times all the tips of laterals are purplish-brown. Throat, breast^ 

 and flanks metallic grass-green. Abdomen velvety-black. 

 Undertail-coverts shining green, with the base of feathers 

 white. Wings purplish-brown. Bill black. 



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



Female. — Exactly like the male, excepting the tips of 

 lateral and outermost rectrices which are broader, and the 

 underside which is white, washed with green. 



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



This species is rare. It was dedicated by Messrs. Bourcier 

 and Mulsant, to Mr. Claude Gay, Naturalist, who explored 

 Chili, during fifteen years. 



