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Vamuna remelana
Sheltering from the rain in the hotel stairwell/passage.
Tropical montane rainforest.
Found the same one as yours, named as Vamuna remelana:
http://www.thaibugs.com/wp-content/galle...
Vamula remelana has usually quite a strong black bar.
http://www.projectnoah.org/spottings/170...