THE BIRDS OF AUSTRALIA. 
series have been collected and there is so much variation that I am at present 
unable to diagnose subspecific forms. As it is admitted that the species 
migrates to and from New Guinea this is not unexpected. I might add that 
two names had been previously given, one to a specimen perhaps from Cape 
York but just as probably New Guinea, and the other to the New Guinea 
representative ! I conclude that with the series available no subspecies can 
be defined. 
Rothschild and Hartert separated the Aru Island form as P. m. 
aruensis {Nov. Zool , Vol. VIII., p. 63, 1910) on account of its slightly smaller 
size wing 97-102, a,v. 100 mm. ; typical 104-117, av. 106 mm. 
18 
