Chalcidodoma pluto is an immense bee recently rediscovered in Indonesia.
I think there was an article on in Bee World within the last 3 or 4 years.
My Bee World's are packed pending a move to a new building here. I can
not recall the island from which the bee came, but Ambon area comes to
mind. Also, if memory serves it is a megachilid.
 
Cheers, Peter.