The costal indentation in the female is less .It is also hard to see the outline of the HW in the post 1 pix.

A good guide is the large palpi in Mahathala.
The HW tornal indentation is only seen in a few Arhopala eg A comica & curiosa.

Two female M. ameria from India, the 2nd showing the upperside.
http://indiabiodiversity.org/observation/show/354144
http://4.bp.blogspot.com/_7zyn8krb1d...+ameria%29.jpg


TL Seow: Cheers.