It is a female Pelopidas agna.
P. agna; UN uniformly brown without uneven shading. Male with FW spot 2 & 3 narrow.
https://www.ifoundbutterflies.org/me...oman_ag263.jpg
http://3.bp.blogspot.com/-3o_pA2jF-Z...PA_male_02.jpg
females.
http://www.butterflycircle.com/check...SwiftF-KSK.jpg
https://commons.wikimedia.org/wiki/F...a_20140621.jpg
P. mathias ;UN ground colour unevenly shaded; paler (grey actually) in the marginal areas or overall grey brown.
https://www.ifoundbutterflies.org/me...wari_ak551.jpg
females.
https://www.ifoundbutterflies.org/me...5811259b-1.jpg
https://www.markeisingbirding.com/si...?itok=iIYrHLC_
P. conjuncta /conjunctus. Large.
Medium brown ;HW wuth white spots & FW with larger yellowish spots .
One male & two females.
https://commons.wikimedia.org/wiki/F...CN0738_(3).jpg
http://www.flutters.org/home/photoga...icture&id=2444
http://www.flutters.org/home/photoga...icture&id=2445
TL Seow: Cheers.