Dear Dr. Seow sir, I have tried ided some of them but not sure about it.
1. Tentative ID: Pithauria cf stramineipennis ? The antennal tip is yellow, similar to Pedesta but not sharply hooked unlike Pithauria?
Confusion: The HW is almost unmarked. The markings on the upper looks a bit different with white spots rather than yellow as in P. stramineipennis. There is a small white apical spot in the UFO and the spots also looks small and rounded unlike Pithauria stramineipennis.