38 Mr. D. G. Elliot on the Trochilidge. 



remaining ones have inner webs, 

 except tips, black, outer webs metallic 

 golden green ; all lateral feathers tipped 

 with bright metallic golden green .... 10. T. nitidicauda ? 

 3. Central pair of rectrices bronze-green, 



lateral ones white, apical portion black . 11. T. chionurus. 

 b'. Under tail-coverts white, with central brown 

 or green streaks. 



1. Median rectrices, except tips, and the 



basal portion of the others bright 

 green ; central part of lateral ones black- 

 ish, tips grey. Throat and breast shining 

 gi'ass-green 12. T. tephrocephalus. 



2. Median rectrices bronze-green, remainder 



black, with pale tips. Throat and 



breast golden green 13. T. tohaci. 



3. Tail black. Throat and breast grass-green, 



with a slight bluish tinge 14. T.fiuviatilis. 



4. Median rectrices gi-een, tipped with black, 



rest black, tipped with white. Thi'oat 



and breast bright golden gi-een 15. 7". apicalis. 



5. Median rectrices green, tipped with 



black, next one on either side bronze- 

 green two thirds their length, rest black ; 

 remaining feathers green at base, then 

 black, with a metallic gi-een spot on the 

 tip, which graduates into white on its 

 upper edge 16, 7". maculicattda. 



6. Tail bronze-green, lateral feathers with a 



subterminal purplish bronze bar, tips 

 ashy grey. Throat and breast glitter- 

 ing bluish green 17. T. lucice. 



c'. Under tail-coverts gi'ey, with a central line 

 of bronze-green. 



1. Crown of head and face glittering green . . 18. T. nitidifrons. 



2. Crown of head and back of neck shining 



greenish blue 19. T. ccBruleiceps. 



C. Throat and upper part of breast blue. 



a. Tail pale gi-eenish bronze, with a subterminal 



blackish bar 20. T. neglectus. 



b. Tail steel-black 21. T. bartletti. 



The members of this genus have a rather extensive geo- 

 graphical dispersion, ranging from and including Mexico 

 in the north, through Central America, down the Andes of 

 South America as far as Bolivia, and along the northern side 



