Pelopidas assamensis.

Large species.
FW & HW spots are white or whitish.
FW spots large, the two cellspots large. oblong. very close or joined.
Antennal shaft with a prominent white band behind the club.
https://www.ifoundbutterflies.org/#!...das-assamensis


Small species.

P. mathias ;Underside uneven shaded paler especially in the marginal zones.
Male with FW spots 2 & 3 large, quadrate.
https://4.bp.blogspot.com/-vqr7KmROf...perside_01.jpg
https://3.bp.blogspot.com/-NQjrfm7_w...enedict_01.jpg
https://www.butterflycircle.com/chec...hee%20Ming.jpg

P. agna: Underside even/ uniformly brown.
Male with FW spots 2 & 3 often rather narrow.
https://www.ifoundbutterflies.org/me...oman_ag262.jpg
https://www.butterflycircle.com/chec...Horace-Tan.jpg
https://www.butterflycircle.com/chec...SwiftF-KSK.jpg



TL Seow: Cheers.