Thanks Gerard, now my suggestion is confirmed a wrong origin for this spm, its nearly sure this spm comes from Madagascar, I got from a dealer in Frankfurt - such a criminal.
I completely agree Gérard, this is the female of Batrachorhina similis... However, Xaurus, you can add to your specimen a label "Madagaskar"... and maybe we will discover that this species has been introduced in Thailand... all is possible.