C. bernardus.
This species is highly variable through out its range. It is probable that it is a species complex (ie comprise of several very closely related spp.)
Typical Malayan forms.
http://i.pbase.com/o6/25/686825/1/86...rduscrepax.jpg
https://a4.pbase.com/g1/25/686825/2/...8.dPc5ZVA5.jpg
A pale macular (composed of spots) band down the middle appear in forms to the north.
https://www.thaibugs.com/wp-content/...istogiton1.jpg
https://www.thaibutterflies.com/wp-c...us-400x284.jpg
TL Seow: Cheers.
Thanks again, Dr Seow!