Arhopala sublustris?

[horace2264]

Dr Seow, is this Arhopala sublustris?

[Psyche]

Yes, it is A. sublustris.

It can be very difficult to differentiate between sublustris & athada if size is unknown.
FW postdiscal band is often dislocated in athada.
HW postdiscal spot 6 tends to be quadrate in athada & somewhat triangular, wider at the top & narrowed downwards in sublustris.

Fleming mentioned another important point; the outer margins of postdiscal spot 6 & 7 are almost in line or somewhat so in athada.
Note the outer margins of the two spots are widely out of line here.

TL Seow:cheers:
The other difficulty is in separating A. sublustris & milleri.
FW spot 9 tend to be shifted inwards in sublustris & in line in milleri.
The upperside of milleri is more matte (not shiny) indigo blue.
The upperside of sublustris is shiny blue which is seen here.

[horace2264]

Thanks, Dr Seow for the confirmation and the notes on the differences between lookalike species. :)