GAME BIRDS OF INDIA AND ASIA. 121 



and the black cap extending down to the eyes ; young birds, 

 however, have a black-spotted brown cap and grey eyebrows, 

 and in those in an intermediate stage the eyebrows are chestnut 

 and the throat also. 



Horsfield Hill-Partridge. 



Arboricola orientalis, Brit. Mus. Cat., Birds, Vol. XXII, 



p. 2l8. 



Horsfield 's Tree-Partridge is dark-brown above, mottled 

 with orange and black on the wings, with white throat and 

 ■eyebrows and drab breast ; the sides are mottled with grey 

 white and black ; the only specimen known came from the 

 mountains of East Java. 



Sumatran Hill-Partridge. 



Arboricola sumairana, Brit. Mus. Cat., Birds, Vol. XXII, 

 p. 219. 



This is another very rare species, inhabiting Sumatra. Its 

 nearest ally is the last, but in the present species there are no 

 white eyebrows, the black and white flank-markings take the 

 form of regular bars, and the general colour above is much 

 brighter brown, with bold black barring. 



Roll's Hill-Partridge. 



Arboricola rolli, Rothschild, Bull. Brit. Ornith. Club, 

 Vol. XXV, p. 7. 



Is most like the Red-billed species, but has the bill black, the 

 crown brown, marked with black, and a large white patch on 

 the ears. It comes from Mt. St. Bajak in N.-W. Sumatra. 



Henry's Hill-Partridge. 



Arboricola henrici. Oustalet, Bull. Mus. Paris, II, 

 P- 317- 

 From Tonkin and Annam, is like the Brown-breasted species, 

 but without the buff eyebrows and with the forehead chestnut 

 instead of bufi. 



