THE SUMATRAN GREEN-BILLED MALKOHA. 
123 
Mergui southwards. It extends down the Malay peninsula and it occurs 
in Sumatra and in Cochin China. It is also said to have been met with 
in Java. , 
Mr. Davison, who observed this Malkoha in Tenasserim and other 
places, says : — In its habits and notes this species resembles R, tristis ; 
but I have occasionally found it in the evergreen forests of the Pakchan. 
I found it common everywhere in the Malay peninsula and shot many^ but 
noticed nothing distinctive in its habits, food or voice. ''^ 
Genus POLIOCOCCYX, Sharpe. 
506. POLIOCOCCYX SUMATRANUS. 
THE SUMATRAN GREEN-BILLED MALKOHA. 
Cuculus sumatranus, Bafl. Trans. Linn. Soc. xiii. p, 287. Rhopodytes suma- 
tranus, Sahad. Ucc. Born. p. 73; Hume ^ Bav. S. F. vi. p. 164; Hume, S. F. 
viii. p. 89 ; Kelham, IMs, 1881^ p. 393. 
Description. — Male and female. Like R. diardi, but with the centre of 
the abdomen^ vent and under tail-coverts deep chestnut ; the facial skin is 
bordered above by a very narrow white band_, and it is also considerably 
larger. 
Legs and feet plumbeous green ; bill pale green ; bare orbital space 
clear orange^ palest round the eye^ shading to blood-red at the posterior 
angle. [Davison.) 
Length 16 inches^ tail 9^ wing 6*2^ tarsus I'bj bill from gape 1*5. The 
female is of about the same size. 
The Sumatran Green-billed Malkoha has been found in Tenasserim by 
Mr. Davison. He says : — " In the secondary scrub, with which a great 
portion of the island of Mergui is covered^ this species was quite a 
common bird. To the north of Mergui I did not meet with it at all, and 
to the south but seldom, although I met with many places that appeared 
to me quite as suitable as the places it frequented on the island of 
Mergui.'' 
It extends through the Malay peninsula and inhabits Sumatra, Bangka, 
Java and Borneo. 
Mr. Davison remarks that the habits of this species are precisely like those 
of R. tristis. Lieut. Kelham found the nest near Perak on the 16th of March. 
He says : — " The nest was a loosely-put-together structure of dry twigs, 
slightly cup-shaped, and built at about 5 feet from the ground, in a bush 
standing on the edge of a jungle-path. The eggs, two in number, were 
