Shipher Wu, a butterfly expert from the National Taiwan University in Taipei, Taiwan, thinks that this is a Dinumma species.
However, according to Dr. Jeremy D. Holloway of the Natural History Museum in London who is an expert on butterflies in South-east Asia, this doesn't look quite right for a Dinumma species.
I hope to find more information about this species.
Any suggestions are welcome!

Sarinbuana Eco Lodge, Mount Batukaru area, Bali, Indonesia, 17 October 2011