Oops!
The upperside shows a tiny spot in space 5 not seen in P. natuna.(upperside spots are all hyaline.)
So this should be P. helena female.
TL Seow:Cheers.
PS A female P. natuna for comparison.
http://4.bp.blogspot.com/-2_B1XQDp-P...0/DSC_0119.JPG