154 
BIRDS OF BEITTSH BURMAH. 
Length 3*5 inches^ tail '6, wing 2, tarsus '8, bill from gape '6. 
The Brown Hill-Wren was obtained by Mr. Davison on the highest 
parts of Mooleyit mountain in Tenasserim. 
It occurs in the hill-tracts of Eastern Bengal and in Nipal. It probably 
occurs in Sikhim ; but I can find no record of its occurrence there. If 
P. lepida of Salvadori should^ as Mr. Sharpe surmises, prove identical 
with the present species, its range will extend to Sumatra. These small 
Hill- Wrens are difficult to shoot and they are easily overlooked. 
Mr. Davison remarks of this species : — " I always met with this in the 
dense fern-growth edging the mountain-streams in heavy forest, creeping 
in and out amongst the stalks of the ferns and little stones like a mouse. 
Usually I saw only one ; sometimes two or three were together. As a 
rule they do not fly when disturbed, but scuttle away out of sight in the 
undergrowth ; but when they do fly it is only for a few yards, and they 
always rise with a very sharp chicks chick, chick. Those I examined had 
fed exclusively on insects. 
Family MOTACILLID^E. 
Genus MOTACILLA, Linn. 
160. MOTACILLA LEUCOPSIS. 
THE BLACK-BACKED WAGTAIL. 
Motacilla leucopsis, Gould, P. Z. S. 1837, p. 78; Swinh. P. Z. S. 1870, p. 121 ; 
Brooks, 8. F. vii. p. 139 ; Hume, S. F. vii. p. 519, viii. p. 103 ; Scully, S. F. viii. 
p. 313 ; Oates, S. F. x. p. 224. Motacilla alba, var. paradoxa, Schrenck, 
Reis. Amur-Lande, Vog. p. 341, Taf. xi. fig. 2 ; Swinh. P. Z. 8. 1871, p. 363 ; 
David et Oust. Ois. Chine, p. 299. Motacilla luzoniensis, Jerd. B. Ind. ii. 
p. 218 ; Brooks, 8. F. ii. p. 457 ; Bl. 8r Wald. B. Burm. p. 96 ; Wardlmv Ramsay, 
Ibis, 1877, p. 462 ; Hume ^ Dav. 8. F. vi. p. 362. Motacilla felix, 8ivinh. 
P. Z. 8. 1870, p. 121 ', Oates, 8. F. x. p. 224. Motacilla alboides {Hodgs.), 
8winh. P.Z. 8. 1871, p. 363; David et Oust. Ois. Chine, p. 298; 8eebohm, Ibis, 
1878, p. 346. 
Description. — Male and female in breeding-plumage. Forehead, feathers 
over the eye, the sides of the head and of the neck pure white ; the whole 
upper plumage, chin, throat and breast black ; lower plumage white ; the 
four central pairs of rectrices black narrowly edged with white ; the next pair 
white with a streak of black on the edge of the inner web ; the outer pair 
white with a still narrower streak of black on the inner web ; smaller 
