Arhopala from ne Thailand

[DaveChiangMai]

This was photographed at Nam Nao NP, ne Thailand, 8 Aug 24. I can only make this A. atrax, but there are a couple of things about that ID I do not like.
Usually in atrax the prominent formwing discal band is even in width throughout its length and straight (not curved as in this specimen).
Usually there are 4 spots/bars visible down the edge of the forewing where the hindwing overlaps. On this one I only see three. Tornal area scaling looks as atrax to me.
Any comments on the ID please? Many thanks.

28568

[Psyche]

Agreed, it is Arhopala atrax.

The 3 in the atrax group.

A. ace have broad straight margined bands; HW mid cell spot is a band across its width ;in the other two it is a rounded spot.
https://yutaka.it-n.jp/lyc4f/82060001.html
https://thaibutterflies.com/Butterflies/arhopala-ace/

The two A. atrax & alax are very similar.
Bands ca be narrow.

Arhopala atrax.
FW postdiscal band is composed of spots with irregularly rounded margins. ( discal =central, postdiscal =outside of central.)
HW postdiscal band is even more irregular.
https://yutaka.it-n.jp/lyc4f/82070001.html
https://thaibutterflies.com/Butterflies/arhopala-atrax/
https://www.ifoundbutterflies.org/sites/default/files/188_78693-563-601690072319a-1.jpg

Arhopala alax have more regular spots forming both FW & HW bands.
https://yutaka.it-n.jp/lyc4f/82080001.html
https://www.flickr.com/photos/angiud/39841931663
https://pamsbutterflies.com/butterfly/360/arhopala-alax


TL Seow: Cheers.

[DaveChiangMai]

Many thanks for the confirmation.