1871.] MR. J. GOULD ON SIX NEW HUMMING-BIRDS. 505 



time, but 1 have delayed characterizing it in the hope that other ex- 

 amples might be received. 



Eriocnemis russata, Gould. 



General plumage of a russet-brown ; wings purplish brown ; 

 tail black ; boots, or feathery covering of the thighs, rather scant 

 for an Eriocnemis, white in front, and of a light cinnamon or deep 

 buff posteriorly. 



Total length 3| inches; bill 1, wing 2|, tail 1|. 



Hub. Ecuador. Supposed to have been obtained on the banks 

 of the Napo ; hut this is by no means certain ; my specimens were 

 received from Quito. 



Remark. Those Trochilidists who are acquainted with the descrip- 

 tion of the little Eriocnemis anrelice will at once perceive that the 

 present bird is very nearly allied to, and may perhaps consider it 

 to be identical with, that species ; but when I assure them that I 

 have carefully compared three or four examples of this bird, which 

 is from Quito, with at least one hundred specimens of the Bogotan 

 E. aurelicE, they will, I trust, do me the justice to believe that I 

 have not characterized it as distinct without due consideration. The 

 E. russata may at all times be distinguished by its larger size, by 

 its russet colouring, and by its much more lengthened bill. 



POLYTMUS LEUCORRHOUS, Gould. 



Polytmus leucorrhous, Gould, MS. ; Sclat. & Salv. in Proc. of 

 Zool. Soc. 1867, pp. 584, 752. 



Polytmus leucoproctus, G. R, Gray, Hand-list of Birds, part i. 

 p. 128.no. 1626. 



Male. The entire upper and under surface pale flowery green, 

 with the exception of the head, which is brown, and the crissum, 

 which is white ; wing-coverts golden green ; wing purplish brown ; 

 tail bright green ; bill light fleshy brown. 



Total length 3§ inches ; bill f , wing 2 J, tail \\, tarsi j\. 



Female. Much smaller than the male, but similarly coloured, 

 except that the three outer tail-feathers on each side are tipped 

 with white, like those of the female of Polytmus viridissimus. 



For our knowledge of the existence of this species we are in- 

 debted to the researches of A. R. Wallace, Esq., and Mr. Edward 

 Bartlett, the former having obtained examples at Cobati, on the Rio 

 Negro, and the latter on the river Huallaga, in Eastern Peru. It 

 is most nearly allied to the Polytmus viridissimus of my Monograph 

 of the Trochilidse (see vol. i. Introduction, p. lxxxv, and vol. iv. 

 pi. 231, and 8vo edit, of Intro, p. 127), but differs from that well- 

 known bird in its under tail- coverts being pure white. 



The specific appellation I have assigned to it first appeared in 

 Messrs. Salvin and Sclater's " List of the Birds collected by Mr. 

 Wallace on the Lower Amazons and Rio Nigro," and subsequently 

 in the same gentlemen's " Catalogue of Birds collected by Mr. E. 

 Bartlett on the River Huallaga, Eastern Peru," above referred to. 



