The present Subfamily consists of birds of grey plumage with ocelli of metallic colour, brilliant in the male but duller or obsolete in the female. The tail-feathers vary in number from twelve to twenty-four.
The sides of the head and face are more or less naked ; the tarsus is long and powerful, sometimes with one or more spurs, sometimes with none ; the plumage is very soft and lax.
The tail-moult commences at the third pair and then proceeds outwardly and inwardly simultaneously.
Key to Genera.
A.Secondaries longer than primaries; tail-feathers twelve............ARGUSIANUS, p. 286.
B.Secondaries no longer than primaries ; tail-feathers twenty to twenty-four...........POLYPLECTRON, p. 289.