893. Aethopyga horsfieldi.
Horsfield's Yellow-backed Sun-bird.
Cinnyris horsfieldi, Blyth, J. A. S. B. xi, p. 107 (1842). Nectarinia horsfieldi (Blyth), Blyth, J. A. S. B. xii, p. 975 ; id. Cat. p. 224. Aethopyga horsfieldi (Blyth), Jerd. B. I. i, p. 366; Walden, Ibis, 1870, p. 36; Shelley, Mon. Nect. pp. xx, 33, pl. 10; Hume, Cat. no. 230. iEthopyga nipalensis (Hodgs.), Gadow, Cat. B. M. ix, p. 26 (part.).
The Green-backed Honey-sucker, Jerd.
Coloration. The male differs from the male of AH. nepalensis in having the back and sides of the neck olive-yellow instead of deep red, there being merely traces of red along the margin of the metallic green of the hind neck; in having the yellow of the breast and upper abdomen almost pure, there being hardly a trace of red, and in having the streaks of crimson on the breast few and indistinct; and lastly in having a much shorter bill, measuring only .8 from gape to tip.
The females of the two species are undistinguishable from each other in colour. The bill of the present species, however, is probably shorter, judging from the length of bill of the males of the two species. The only female AH. horsfieldi that I have been able to examine is without a bill.
Distribution. Garhwal, Kumaun, and Nepal, but probably only the extreme western portion of the latter State. This species descends to the Dehra Dun, and probably is found up to 6000 feet, as is the case with AE. nepalensis.