"This is a difficult one as the general color is darker than normal pertextalis. That may be due to lighting conditions.
The reniform and orbicular are the same color as the other forewing markings (therefore keys to pertextalis in Handfield & Handfield) and the reniform is not filled (usually filled in thestealis).
Also the hindwing terminal and subterminal lines are touching, which I don't think is ever the case in thestealis, and the forewing subterminal line is straight towards the costa, whereas in thestealis it usually turns inwards.
Unfortunately the size cannot be judged from the photo"... Steven Whitebread
Williamstown, MA