I did a check of the Arhopalas, and the spot in space 11 practically IDed it as a member of the alitaeus group as you indicated earlier.
Only a few other with distinctive markings, eg. democritus have this spot.
The members with a slatey glaze and stronger contrasted markings are A. aida, havilandi, alitaeus, & sintanga.Both havilandi & sintanga are confined to Borneo & southern Malaya. In any case they look quite different.
A. alitaeus is obviously different with its rounded spots.
A. aida from Ko Samui looks quite different too.
http://commons.wikimedia.org/wiki/Fi...aMFUpUnAC1.jpg
Two possible members of group in Yutaka website, A. atrax & A. alax are found well up north.
I am just at a loss what this should be at the moment.
TL Seow
PS. A. atrax & alax do not seem to be in the alitaeus group.
http://commons.wikimedia.org/wiki/Fi...xMFUpUnAC1.jpg
http://www.flickr.com/photos/monsoon...oi/4288022972/