390 Mr. W. R. Ogilvie Grant on the 



Arboricola. 



Tail of fourteen feathers, short and somewhat rounded, the 

 middle pair of feathers being rather longer than the outer 

 pair, and equal to two fifths of the length of the wing. 



The first primary is about equal to the ninth (sometimes 

 to the eighth or tenth), and the fourth or fifth is slightly the 

 longest. 



Tarsi without spurs. 



Nails unusually long, rather wide, and only very slightly 

 curved*. 



Key to the Species 0/ Arboricola f. 



A. Concealed patch of downy feathers under the 

 wing grey. 

 a. Feathers of the sides and flanks grey, or 

 grey edged with chestnut, usually with 

 a white spot or shaft-stripe on each. 

 a'. Upper back olive-brown, barred and 

 fringed with black. 

 a^. Top of the head bright chestnut, chin 

 and throat black, in some specimens 

 each feather narrowly- margined 



with white A. torqueola, J . 



b'^. Top of the head brownish or olive- 

 brown, each feather tipped with 

 black, 

 a'. Chin, throat, and neck rufous, the 

 two latter spotted all over with 

 black, sometimes on the sides 



only A. torqueola, 5 • 



6'. Chin and throat black, front of 

 neck black, each feather edged 

 with white A. atrogularis, (^ $ . 



* The nails of Arboricola are quite characteristic, and the species of 

 thi3 genus may be readily recognized by them alone. 



t Perdix (Arboricola) sp., v. Martens, J. f. O. 1866, p. 25. 



Under this title a specimen in the Military Library at Manilla is briefly 

 characterized as follows : — " Head greenish black, breast vinous-red 

 streaked with black, sides pale red with black spots." This description is 

 so vague that it is impossible to form a decided opinion on it, but probably 

 the bird represents a distinct species of this genus, inhabiting Luzon. 



