A tricky Isma species

[DaveChiangMai]

Photographed at mid elevations on Doi Pha Hom Pok, n Thailand. I can nail this down as far as an Isma species, but searches and literature after cannot find a pattern match for this individual. Suggestions please.

Many thanks

24472

24473

[Psyche]

Polytremis discreta.

Two species can be very difficult in pix.

P. eltola :HW lower margin cilia ochreous.
http://www.ifoundbutterflies.org/media_images/2015/94_3541-503-54c76fb31fc25-2.jpg

P. discreta :HW lower cilia whitish.
http://wingscales.com/content/record/499-1-884e1.jpg

TL Seow: Cheers.

[DaveChiangMai]

Many thanks for that. So much for my skill at identifying it as an Isma!

Dave