56 A MONOGRAPH OF THE PHEASANTS 



Five full species and one subspecies of Polyplectron are recognized in this 

 monograph : 



Grey Peacock Pheasant Polyplectron bicalcaratum bicalcaratum (Linne). 



Germain's Peacock Pheasant Polyplectron bicalcaratum germaini Elliot. 



Malay Peacock Pheasant Polyplectron malaccensis (Scop). 



Hainan Peacock Pheasant Polyplectron katsumatae Rothschild. 



Borneo Peacock Pheasant Polyplectron schleiermacheri Briiggemann. 



Palawan Peacock Pheasant Polyplectron napoleonis Lesson. 



KEY TO THE FORMS OF POLYPLECTRON 



I. Mantle and wing-coverts with metallic tips or ocelli (males) 

 a Ventral plumage brown, speckled with pale buff. 

 a' Larger, with ocelli chiefly violet and purple. 

 «" Outer tail-feathers with ocelli on both webs. 



a^ General colour mottled grey bicalcaratum bicalcaratum. 



b^ General colour, dark blackish grey bicalcaratum germaini. 



b" Outer tail-feathers without ocelli on the inner web . . malaccensis. 

 b' Smaller, with ocelli chiefly greenish ...... katsumatae. 



b Ventral plumage black, sometimes minutely dotted. 



c Mantle and wings with distinct ocelli ..... schleiermacheri. 



d' Mantle and wings solid metallic blue and green . . . napoleonis. 

 1 1. Mantle and wing-coverts lacking, or with rudimentary, ocelli (females). 

 a Outer tail-feathers with metallic ocelli on both webs. 



a' Larger, with lighter coloured plumage, elsewhere than Hainan. 



«" Mantle and greater tail-coverts without metallic ocelli . . bicalcaratum bicalcaratum. 

 b" Mantle and greater tail-coverts with metallic ocelli . . bicalcaratum germaini. 

 b' Smaller, with darker plumage, on Hainan only .... katsumatae 



b Outer tail-feathers with metallic ocelli only on outer web. 



c Greater tail-coverts with metallic ocelli ..... malaccensis. 



d' Greater tail-coverts without metallic ocelli. 



c" Head without noticeable crest ...... schleiermacheri. 



d" Head with very long, thin-vaned crest napoleonis. 



