The strongly bowed FW & more uniformly dark coloured antennae & wings indicate it is Baoris oceia.

The FW spots are whitish but can appeared yellowish at times.
http://www.butterflycircle.com/check...-Simon-Sng.jpg
http://4.bp.blogspot.com/-moNZL_baAc...wn+skipper.jpg
http://www.butterflycircle.com/check...ift---Khew.jpg



TL Seow: Cheers.