536 Mr. W. R. Ogilvie Grant on the 



white with rather narrow wide-set black bars, 

 which are generally confined to the middle of 

 the feathers A. mndanensis. 



Females. 



A. Throat and bi^east uniform grey ; belly and under- 



parts barred with black and white. 

 a. Lower back, rump, and upper tail-coverts barred 

 with black. 



a . Feathers of the rump dark grey, barred with 

 black and fringed with whitish ; general 

 colour of the upper parts and breast darker 

 grey; black bars on the belly and flank- 

 feathers as wide as, or wider than, the white 

 interspaces, giving these parts a much blacker 

 appearance ; under tail-coverts with wide 

 bars of black and white, the former being 

 rather wider . A. striatus. 



V . Feathers of the rump white barred with black ; 

 general colour of the upper parts and breast 

 paler grey ; black bars on the belly and flank- 

 feathers much narrower than the white inter- 

 spaces, giving these parts a whiter appearance ; 

 under tail-coverts white, with one or two 



narrow wide-set black bars A. sumatrensis. 



h. Lower back, rump, and upper tail-coverts uniform 



grey like the back A, cehuensis. 



B. Entire upper and underparts uniform grey. 



c. Smaller. Tail 4*7, wing 6'2 inches A. mindorensis. 



d. Larger. Tail 5*6, wing 6*7 inches A.guillemardi^. 



C. Entire underparts barred with black to the throat ; 



rump and upper tail-coverts barred with black. 



e. Under tail-coverts widely barred with black and 



white, the black bars being as wide as the white 

 interspaces ; patch of feathers covering the 

 nostrils grey like the rest of the crown ; general 

 colour of the throat and breast grey barred with 

 black, contrasting with the black and white 

 belly ; black bars on the belly and underparts 

 very wide A. panayensis. 



f. Under tail-coverts either pure white, or white 



* The only female of A. guillemardi in the British Museum collection 

 is not quite adult. 



