I have seen your website on D. nolens & I think it is fine as it is.
Often as not the obvious & common one ends up being coorect.
My curiosity is the male you put up. Its wingshape also suggest it could be a female . I supposed you have seen the upperside.
http://www.samuibutterflies.com/02_i...nspasteuri.jpg
The underside pattern & colour also matched that of the specimen female so in all likelyhood they are the same species.
If it is male it strongly suggest D. nelvis.
Fleming's description of nelvis is the best match ie. underside greyish buff with slight reddish or purple glaze vs for D. nolens (C&P4) underside buff with faint purple glaze(absent in female) .
TL Seow
PS. If it is female it also strongly suggest D. nelvis as the female nolens should only be buff without any reddish/purple glaze.