Udara with distinct iD feature.

[Psyche]

These two are very similar and seem to have been much confused.

Celastrina lavendularis.
the key separate Celestrina based on the darker ground and prominent white rings around the spots.
However, in P. Malaysia there is only C. levandularis to contend with.
Underside ground darkish grey with prominent white rings around the spots.
UnH spot 7 and sub-basal spots very dark.
UnH submarginal lunulate line often rather pointy.
HW marginal spots often heavy.
Forms with smaller spots also occur.
https://yutaka.it-n.jp/lyc4/80870020.html
https://wingscales.com/Lycaenidae/Ce...laris-isabella
https://www.gbif.org/occurrence/2847200101
https://www.gbif.org/occurrence/2847199548
https://www.gbif.org/occurrence/2847199548
https://www.gbif.org/occurrence/4177487516
https://www.inaturalist.org/observations/181049771


Udara placidula.
Udara species care marked as in Celestrina.
U. placidula is greyer than U. dilecta and have HW spot 7 blacker and darker than the other postdiscal spots.
The general appearance is like C. lavendularis.
However the white rings are only weakly developed.
UpF male with a very narrow border.
HW submarginal lunules more rounded.
https://yutaka.it-n.jp/lyc4/80770010.html
https://thaibutterflies.com/Butterfl...ara-placidula/
https://commons.wikimedia.org/wiki/F...laFUpUnAC1.jpg
https://upload.wikimedia.org/wikiped...aMFUpUnAC1.jpg
https://www.inaturalist.org/observations/214331294

The two museum specimens have some problem.
1. This lack submarginal spots and look to be U. camenae.
https://www.gbif.org/occurrence/2847201798
2. The male upperside looks correct, but the UnH spot 7 is pale.
https://www.gbif.org/occurrence/2847201795

Added. found valid specimens.
https://www.gbif.org/occurrence/2847202355
https://www.gbif.org/occurrence/2847201800
https://www.gbif.org/occurrence/2847201794