GENEBA AND SPECIES. 215 



upper tail-coverts green ; the rump crossed by a 

 band of buffy-white ; tail purplish-brown, with 

 a broad stripe of buff down the centre ; the 

 lateral tail feathers tapering and terminating iu 

 a large spatulate tip ; bill black. 



Total length, 4 inches ; bill, f ; tail, 2|. 



Locality : Brazil. In Gould's cabinet. 



Genus TBYPH^NA, Gould. 



In this genus the males and females differ 

 considerably in plumage. The male has the tail 

 greatly forked, and in some species the outej- 

 tail-feather on each side is incised near the tip, 

 which tip expands almost racket-like ; the 

 gorget is ample, the beak long, and nearly 

 straight ; the wings rather small. In the 

 female the tail is even. 



The typical form of this genus, is Tryphcena 

 Duponti (Trochilus Dupontii, Lesson.) This 

 species is described and figured in the Natural- 

 ist's Lib. Ornith. vol. i. p. 131, pi. 26. 



Locality: Mexico, Guatemala. 



Trochilus amethystinus, Gmelin. This species 

 is described as the Amethystine Humming-bird 

 in the Naturalist's Lib. Ornith. vol. ii. p. 64, 

 pi. 9. 



Trochilus amethystoides, Less. This species 

 is described as the Little Amethystine ' Hum- 

 ming-bird in the Naturalist's Lib. Ornith. vol. 

 ii. p. 62. Locality : Brazil. May not this 

 species be a variety of the preceding ? Lesson 



