The Nicobar White-backed Munia.
Munia semistriata, Hume, S. F. ii, p. 257 (1874). Amadina semistriata (Hume), Hume, Cat. no. 701 quat. Uroloncha semistriata (Hume), Sharpe, Cat. B. M. xiii, p. 361.
Coloration, Resembles U. striata but is smaller; the striations or white shafts on the upper plumage less distinct; and the feathers of the fore neck and breast dark brown, not deep black, with conspicuous rufous-brown margins.
Length about 4.2; tail 1.6; wing 1.8; tarsus .5; bill from gape .4.
Distribution. The Nicobar Islands.