It is a female Telicota.

Almost all Potanthus have a big spot in space 7 on the hindwing. If that is absent then there is a spot in space 6 above the band.
The 3 forewing subapical spots are also well-defined in Potanthus..

There is a dusky shading throughout the hindwing. The veins are lightly darkened.
These 2 features indicate this should be a female Telicota ohara.

TL Seow