Jester

This is only the second time I have spotted this distinctive butterfly in 18 months of daily safaris. The first specimen was damaged, with its rear end missing, but today’s specimen was perfect.

I must note that this is currently wet season, an important factor when identifying this type of butterfly.

I found two quality references with images that suggest Symbrenthia hippoclus
http://motyli.wz.cz/nymphal/symbrenthia.htm this link also has lilaea.

http://www.flmnh.ufl.edu/butterflies/neotropica/sulawesi/checklist.html

Wikipedia has the jester under Symbrenthia lilaea.
http://en.wikipedia.org/wiki/Symbrenthia_lilaea

Wikimedia has Symbrenthia hippoclus which looks very close.
http://commons.wikimedia.org/wiki/Symbrenthia_hippoclus

The image on wikipedia looks incorrect to me.
http://en.wikipedia.org/wiki/File:Common_Jestor_%28Symbrenthia_hippoclu…

They are extremely close, you can decide.

Update - changed name to Symbrenthia lilaea javanus, as I found a female that matches the motyli link:
http://www.projectnoah.org/spottings/17204024