148 Genera of Humming Birds. 



Differs only from L. leucogaster } by reason of its uniform 

 tail feathers, these never being margined with white, as well 

 as by its shorter bill. 



This species was discovered in Peru, by Mr. H. Whitely. 



^209. Agyrtria alleni, Elliott, Auk., 1888, p. 263. 

 Allen's Emerald, 

 le Thaumatias d'Allen. 

 Habitat. — Yungas, Bolivia. 



Top of head and occiput dark greenish-blue, not metallic ; 

 nape, back, and shoulders, shining grass-green ; rump and 

 uppertail-coverts glittering bronze. Tail shining bronze, with 

 the tips- of feathers pale gray, widest on the outermost rectrices, 

 and diminishing to the central ones, which have a mere indica- 

 tion of gray at the tip. Wings purplish-brown. Sides of neck 

 shining bluish-green. Throat and centre of breast white, 

 speckled with shining green ; sides of breast and flanks 

 metallic grass-green. Abdomen whitish. Undertail-coverts 

 pale brown, edged with white. Maxilla black. Mandible 

 flesh colour, tip black. Feet black. 



Total length, 3iin. Wing, if, Tail, i t 7 q. Bill, f. 



" Elliot's loc. cit." 



Type unique in the New York American Museum of 

 Natural History. 



It was brought from Bolivia, by Doctor H. Rusby. 



210. AGYRTRIA COMPSA, Hein., Journ. fur Ornith., 1863, p. 185. 



Agyrtria mellisuga, Cab. and Hein., Mus. Hein., i860, t. iii., 



P- 34- 



Thaumatias compsa, Elliot, Ibis, 1878, p. 45. 



Heine's Emerald, Gould, Mon. Troch. Suppl., 1886, p. 75, 



Le Thaumatias de Heine. 



Habitat. — Guiana, Brazil. 



Male. — Forehead, sides of neck and breast metallic 

 golden-green. Upperside golden-green. Median rectrices 

 dark bronze, lateral purple-blue. Throat, centre of breast, 

 abdomen, and undertail-coverts white. Flanks golden-green. 

 Wings purple-brown. Maxilla black. Mandible flesh-colour 

 with black tip. 



Total length, 3iin. Wing, 2. Tail, if. Culmen, J. 



