107 
uncertainty. They appear, however, to belong to this form and not to 
the more northern S. sordida, Hume, which is found on Mt. Muleyit 
in Central Tenasserim. 
104, HERPORNIS ZANTHOLEUCA. 
Herpornis zantholeuca (Hodgs.); Sharpe, tom. cit., p. 636; 
Robinson and Kloss, tom. cit., p. 63. 
Eleven skins from the lower slopes of Kao Nawng, where it was 
one of the commonest birds. 
105. PTERYTHIUS MRALATUS. 
Pterythius xralatus (Tick.); Gadow, Cat. Birds Brit. Mus., viii, 
p. 114 (1883) ; Oates Faun. Brit. Ind. Birds, i, p. 225 (1889). 
A very common species above 2,000 feet on Kao Nawng. 
“Tris chestnut, bill black on culmen, remainder plumbeous, feet 
pale flesh, claws dark.” 
106. MESIA ARGENTAURIS. 
Mesia argentauris (Hodgs.) ; Sharpe, tom. cit., p. 642. 
Apparently quite common above 3,000 feet; five specimens were 
obtained by the Dyaks in the vicinity of the upper camp on Kao 
Nawng. 
TROGLODYTID Ai. 
107. PN@PYGA PUSILLA. 
Pnepyga pusilla, Hodgs.; Sharpe, Cat. Birds Brit. Mus., vi, 
p. 304 (1881). 
A pair of hill-wrens from near the summit of Kao Nawng at 
about 4,000 feet differ from others from the southern parts of the 
Peninsula, of which the Museum possesses a large series in being rather 
duller above and in having the lower surface much less strongly 
squamate. They are probably referable to the above-named species, 
which has been found as far south as Muleyit Mountain in Central 
Tenasserim, while the southern Malayan specimens have been identified 
with Pn. lepida, Salvad. from the mountains of Sumatra. 
TURDID A. 
108. HYDROCICHLA RUFICAPILLA. 
Hydrocichla ruficapilla (Temm.); Sharpe, Cat. Birds Brit. 
Mus., vii, p. 319 (1885). 
Very common along the rocky streams on Kao Nawng. 
“Tris chestnut, bill black, feet pale lilac flesh.” 
109. HYDROCICHLA FRONTALIS. 
Hydrocichla frontalis (Blyth) ; Sharpe, Cat. Birds Brit. Mus., vii, 
p. 321 (1885) ; Robinson and Kloss, tom. cit., p. 64. 
On Kao Nawng, but much rarer than the preceding. 
