420 Zoological Society. 



the neck, deep velvety black ; throat luminous pale green, passing 

 into rich orange in the centre ; two centre tail-feathers purplish 

 green, the remainder deep purple, the feather on each side the cen- 

 tre ones much- elongated and crossing each other near the base ; 

 upper tail-coverts luminous light green with red reflexions ; under 

 tail-coverts luminous green ; primaries purplish brown ; bill black ; 

 feet blackish brown. 



Total length from the tip of the bill to the end of the centre tail- 

 feather, 6 inches ; to the end of the elongated feathers, 8| ; bill, 1£ ; 

 wing, 3-i-; tail, 2f, of the elongated feathers, 4f. 



Hab. Rio Negro, Brazil. 



Remark. — I consider this to be without exception the most gor- 

 geous species of the Trochilidse yet discovered. It is somewhat 

 larger than, but of precisely the same form as, T. pella, which fine 

 species it far exceeds in the brilliancy of its colouring, and from 

 which it is at once distinguished by the fiery lustre of its body and 

 the purplish colouring of its tail-feathers. 



2. Trociiilus (lesbia) smaragdinus. Troch. vertice fulgente vi- 

 ridi ; guldnitente cceruled; caudd perlongd, furcatd, fulgentissimd 

 metallice viridi; pogoniis rectricum externarum utrisque ad basin 

 et internis reliquarum pogoniis nigris. 



Crown of the head luminous green ; throat shining steel-blue ; 

 body green, the under surface with a golden tinge ; tail very long 

 and forked, metallic green and very luminous ; basal portion of both 

 webs of the outer feathers and the inner webs of the remainder 

 black ; wings brown ; bill black. 



Total length, 1\ inches; bill, f ; wing, 2f ; tail, 5. 



Hab. Bolivia. 



Remark. — This beautiful species is nearly allied to the Ornismya 

 Kingii, Less. 



3. Trochilus (lesbia) gracilis. Troch. guld nitente metallice 

 viridi; caudd perlongd v aide furcatd ; rectricibus externis ccneo- 

 fuscis, ceneo colore ad splendentem maculam cujusque in apice 

 plumce fulgentiore, pogoniorum externorum dimidio basali cervino ; 

 reliquis rectricibus aureo-viridibus ad basin fuscis. 



Throat beautiful shining metallic green ; the remainder of the 

 body golden-green; wings brown; tail very long, much-forked; 

 the outer feathers bronzy brown, the bronze gradually increasing 

 in intensity and becoming a brilliant spot at the tip ; basal half of 

 the outer webs buffy white ; remaining feathers brown at the base 

 and shining golden green for the remainder of their length ; bill 

 black. 



Total length, 6J inches ; bill, ^ ; wing, 2-*- ; tail, 4$. 



Hab. Peru. 



Remark. — This species is very closely allied to the Trochilus 

 Gouldii, Lodd., vide Proc. of Comm. of Sci. and Corr. of Zool. Soc, 

 part 2, p. 7, which is synonymous with the Ornismya Sylphice, Less., 

 but from which it differs in several characters, which upon an exami- 

 nation of many specimens, are found to be constant ; the bill is 



