Differentiation for Rapala dieneces and R. damona

[DaveChiangMai]

I photographed this in Omkoi WS, nw Thailand, May 25, at 925 m. Open scrub on dry forest edge.
I'm pretty sure it's either Rapala dieneces or R. damona, both of which there are records in the area.
Without an upperside I am not sure if it's possible to tell them apart.
Any ideas or suggestions please?
Many thanks.

28829

[Psyche]

Male Rapala dieneces.

Rapala dieneces.
FW postdiscal line/band nearly straight or only slightly curved.
HW orange crown better defined, often with 'leakage into adjacent areas.
HW speckled patch relatively small occupying about half the space below the postdiscal line.
Male, Female Singapore.
https://www.butterflycircle.com/checklist/mugshots/Rapala%20dieneces%20dieneces/SF_adult_M_5a_c.jpg
https://www.butterflycircle.com/checklist/mugshots/Rapala%20dieneces%20dieneces/ScarletFlash_Nelson.jpg


Rapala damona.
FW postdiscal line/band strongly bent in towards the costa.
HW orange crown weak, no leakage.
HW speckled patch occupying 80% or mor of the space below the postdiscal line.
Ground more orangey brown.
A recent series of fine observations were recorded from Singapore.
Two males and two females.
https://www.inaturalist.org/observations/283545673
https://www.inaturalist.org/observations/283545668
https://www.inaturalist.org/observations/283545687
https://www.inaturalist.org/observations/283543276


TL Seow: Cheers.

[DaveChiangMai]

Many thanks for the details