10 
BIRDS OF BRITISH BURMAH. 
Length 7*5 inches, tail 2-8, wing 4_, tarsus 1, bill from gape I'l. 
The Blue-headed Rock-Thrush is recorded from Arrakan by Mr. Bly th ; 
and I can find no other instance of its occurrence in Burmah. 
It inhabits the Himalayas during the summer, from Assam up to Cashmir. 
During the winter it descends into the plains, and has been found as far 
south as Travancore. It probably inhabits the hill-ranges of the Indo- 
Burmese countries. 
According to Dr. Scully it is found in Nepal on the hill-sides only, and 
seems to frequent by preference little dry nullahs overgrown with bushes 
and small trees. It breeds in the Himalayas. 
9. MONTICOLA EEYTHROGASTEH. 
THE CHESTNUT-BELLIED ROCK-THRUSH. 
Turdus erythrogaster, Vigors, P. Z. S. 1831, p. 171. Orocetes erythrogastra, 
Je7'd. B. Ind. i. p. 514 ; Wardlaiv Ramsay, P. Z. S. 1876, p. 677 ; Hume 8f Dav. 
S. F. Vi. p. 250; Wardlaw Ramsay, Ibis, 1877, p. 463. Petrophila erythro- 
gaster, Hume, Nests and Eggs, p. 227; id. S. F. viii. p. 94 ; Scully, S. F. viii. 
p. 282. Monticola erythrogaster, Dav. et Oust. Ois. Chine, p. 159 ; Seehohm, 
Cat. Birds B. Mus. v. p. 325. 
Description. — Male. Whole upper plumage cobalt-blue, more or less 
dusky, and occasionally blackish, on the back ; wings black, all but the 
first two primaries blue on the outer web ; lores, cheeks and ear-coverts 
black ; chin and throat dusky blue ; remainder of lower plumage with the 
axillaries and under wing-coverts bright chestnut ; tail blue, turning to 
dusky on the inner webs. 
Female. Upper plumage brown, the rump, lower back and upper tail- 
coverts barred with black ; wings brown, each feather edged with dusky 
white ; chin and a line down the throat buff ; a spot on the side of the neck 
fulvous ; sides of the head blackish, with pale central streaks ; under 
plumage buffy, barred with black ; axillaries buff, barred with black ; tail 
uniform brown. 
Young birds are clothed like the female ; but at first the wing-coverts 
and the whole back are barred with black like the rump. These bars 
gradually disappear. The variations of colour in the young are very 
great. A young male in the Seebohm collection, with a few traces of 
blue on the black, is coloured like an adult female, but has a large buff 
patch on the lower throat. Another, with a good deal of blue on the 
black, has the whole head and back marked with large triangular spots 
of buffy white, the tips of the upper tail-coverts are deep chestnut, and 
the greater portion of the lower body has turned to chestnut. It was 
procured in August. 
