iS4i GENERA AND SPECIES. 



The type of this genus is the Trochilus Thau- 

 matius, Linn. (Ornismya albiventris, Lesson). 

 In this genus the beak is straight; the tail 

 square, or a little forked ; the wings moderate. 



As examples of this genus, we may instance 

 the "White -eared Humming-bird (Trochilus leu- 

 cotis, Yieill.) described and figured in the Na- 

 turalist's Library, Ornith. vol. i. p. 137, pi. 29 ; 

 the Blue-green Humming-bird (Trochilus cy- 

 aneus, Vieill.) described and figured in the same 

 work, vol. i. p. 95, pi. 7 ; the Sapphire and eme- 

 rald Humming-bird (Trochilus bicolor, Grmelin), 

 described in the same, vol. ii. p. 84 ; and the 

 Ourissia (Trochilus Ourissia, Linn. ; Ornismya 

 Maugei, Less.), described in the same, vol. ii. 

 p. 85. 



A new and beautiful species is the Trochilus 

 Millerii of Loddiges, described by M. Bourcier 

 in the Proceeds. Zool. Soc. 1847. 



Adult male : Beak straight, cylindrical, white 

 at the base of the under mandible ; top of the 

 head and sides of the neck covered with silky 

 feathers of a brilliant grass green; shoulders, 

 back, and upper tail-coverts, glossy golden green; 

 throat, chest, abdomen, and under tail-coverts, 

 milky-white ; flanks spotted with golden green : 

 wings moderate, of a violet grey ; tail slightly 

 forked, with narrow feathers of a pale grey-green, 

 spotted transversely with brown towards their 

 extremity; the two central tail-feathers are 

 rounded, and without spots ; feet black. 



