Greater banded hornet attacking the nest of Paper wasp and devouring its pupae

Vespa tropica, (the greater banded hornet), is known to be a predator of Ropalidia marginata, the paper wasp. This nest of the paper wasp, Ropalidia marginata was set up since June 2014 and once or twice I have seen Vespa tropica monitoring this nest. Then on 15th October, 2014 around 1. 15pm I saw Vespa tropica sitting on the nest and devouring away the grub of the paper wasp. The nest mates apparently didn’t resist and were looking on avoiding a confrontation and the hornet just devoured. The hornet’s mo