ID Needed for Arhopala from Langkawi 2015

[Blue Nawab]

Dear Dr Seow, what's this Arhopala? Thanks!
https://c1.staticflickr.com/1/579/23191703599_535ac5da6e_b_d.jpg

[atronox]

Probably Arhopala lurida (From C&P4, "Underside markings better defined... than atosia"). My personal observation is that the epimuta group members have a distinctive dark brown zig-zagged band at the termen of the ventral hindwing. Of course if the dorsal can be seen then this group is immediately recognisable.

[Psyche]

This should be Arhopala lurida.

A. lurida & atosia are very similar on the underside .
In Langkawi A. lurida is common.

Common features; FW with postdiscal spot 4 shifted out (variably)
HW spot 5, 6, & more or less staggered, ie spot 6 is further in & spot 7 still more (often slight).

A. lurida.Underside more strongly defined & contrasted ie markings darker & stand out more.
HW typically with postdiscal spots 4 & 5 more or less aligned or at least by half.
HW submarginal spots more pointed.
In Langkawi a purple wash may be present giving a very strong contrast.
Examples from Langkawi
http://4.bp.blogspot.com/-RsKPooOdJpw/Ur7VFXrh4kI/AAAAAAAANKA/3nXI5xyZz3M/s1600/HFH_0280+Arhopala+lurida+(TBC).jpg
http://3.bp.blogspot.com/-VQ_bV9tsmjY/UOhDvdd4aII/AAAAAAAAIVM/Pr9mOZm0e2E/s1600/LKW+2096+Arhopala++lurida.jpg
http://1.bp.blogspot.com/-EgsQ0eJHskg/Ur7XQt45urI/AAAAAAAANKU/Gzvfx6nES7M/s1600/HFH_9998-Arhopala+lurida+@+LS.jpg
Borneo
https://upload.wikimedia.org/wikipedia/commons/c/cf/ArhopalaLuridaMUpUnAC1.jpg
Probable lurida Malaya.
http://1.bp.blogspot.com/-77ePzykO37I/VGxfRoinn9I/AAAAAAAARSU/0zrSd5hz6vs/s1600/DSC_0148.JPG

A atosia. Underside markings pale & poorly contrasted.
HW postdiscal spots 4 & 5 typically almost completely out of line.
HW submarginal spots flatter.
Singapore.
http://www.butterflycircle.com/checklist/mugshots/Arhopala%20atosia%20malayana/A_atosia_01.jpg
http://4.bp.blogspot.com/-vbDyPYyyT_A/TdcZpbANXcI/AAAAAAAAEW0/LllOWGziMs4/s400/DSC_0029-Arhopala.jpg
Malaya
http://4.bp.blogspot.com/-HeaqxUa0Tzk/VSM7cSq2OnI/AAAAAAAAUyk/Svg2H7kDUUE/s1600/DSC_0138.JPG
http://malaysianinsects.web.fc2.com/Arhopala-atosia.JPG
Borneo.
https://species.wikimedia.org/wiki/Arhopala_atosia#/media/File:ArhopalaAtosiaAtosiaMFUpUnAC1.jpg

A. lurida is recorded from Singapore ,but as it differs little(Malayan form) from atosia it may have been overlooked.

TL Seow:Cheers.