THE DUSKY BROADBILL. 431 
of Tonglioo,, and Capt. Bingham states that it is common in the Thoung- 
yeen valley. 
It extends down the Malay peninsula_, and is found in Sumatra and 
Borneo. 
Mr. Davison remarks : — ^^This species is spread throughout Tenasserim, 
but is nowhere abundant, being found in pairs or small parties,, usually in 
moderately thin forest, but it occurs also in dense forest. During the day 
it is sluggish, and a party will, like Serilophus lunatus, allow themselves to be 
shot one after the other without any attempt to escape. They have an oft- 
repeated, mellow, rather musical note, quite different from, and not at all 
of the same class as, that of the three preceding species, and also a clear 
whistle, which they utter when flying from tree to tree.^"' 
END OF VOL. I. 
