This should be correct as Mycalesis or Telinga nicotia.
The feature you pointed out does not occur in all individual.

The three similar species may be IDed as follow, WSF only.
MYCAL.png


Telinga malsara.
https://www.ifoundbutterflies.org/si...ekar_aa682.jpg
https://www.ifoundbutterflies.org/si...471ac20b-1.jpg


Telinga misenus.
https://www.ifoundbutterflies.org/si...3755f8-1_3.jpg
https://www.ifoundbutterflies.org/si...498d31-1_0.jpg


Telinga nicotia.
https://www.ifoundbutterflies.org/si...0cfb6848-1.jpg
https://www.ifoundbutterflies.org/si...aa88887a-1.jpg


TL Seow: Cheers.