According to Shipher Wu, a butterfly expert from the National Taiwan University in Taipei, Taiwan, this is probably Callopistria insularis.
However, Dr. Jeremy D. Holloway of the Natural History Museum in London who is an expert on butterflies in South-east Asia, thinks that this is not a Callopistria species, but possibly a Sasunaga species.
I hope to get more information about this species.
Any suggestions are very welcome!

Sarinbuana Eco Lodge, Mount Batukaru area, Bali, Indonesia, 18 October 2011