71. Garrulax diardi.
The Siamese White-crested Laughing-Thrush.
Turdus diardi, Less. Tr. d'Orn. p. 408 (1831). Garrulax leucogaster, Wald. P. Z. S. 1866, p. 549; id. Ibis, 1867, p. 381. Garrulax diardi (Less.), Hume, S. F. ix, p. 292; Oates, B. B. i, p. 34; Sharpe, Cat. B. M. vii, p. 437.
Coloration. Lores, ear-coverts, and round the eye black; the whole head and crest, cheeks, chin, throat, breast, and the whole abdomen white, the hinder part of the crest pale ashy, spreading over the whole hind neck and encroaching on to the sides also; entire upper plumage bright ferruginous ; sides of the body, thighs, and under tail-coverts rufous olive-brown ; wings brown, with the outer webs rufous-brown ; tail dark brown washed with olive.
In the dry skin the bill is black and the legs plumbeous.
Length about 11 ; tail 5; wing 5.5 ; tarsus 1.6; bill from gape 1.3.
This species may be readily separated from the two preceding by the ashy hind neek and by the entirely white abdomen.
Distribution. The only specimens procured within my limits are two which were obtained by Captain Hill's Survey party on the hills of Tenasserim, apparently between Tavoy and the Siamese frontier. They passed, through Mandelli, into the Hume Collection and are now in the British Museum. There are other specimens from Siam, Cambodia, and Saigon in the same collection and all of them are alike in plumage.