Confidence: It's likely to be this, but I can't be certain.
Notes: Closely matches book picture page 252 of Sterling and Psrsons. Forewing greyish background colour with first third shaded reddish brown. Oblique cross line at one third, well defined as nears dorsum and preceded by a fine grey line that encloses black and then purple red bands. Black dots in middle pale grey area on forewing appear to be obliquely aligned with the tornus.