Pangora matherana

SS: Pangora erosa Walker 1855, probably, but not conclusive evidence, as this is such a variable species.
Aloa erosa Walker, 1855; List Spec. Lepid. Insects Colln Br. Mus. 3: 708; TL: Ceylon. Text at https://archive.org/details/listofspecimens13brit/page/708/mode/1up?view=theater
Pericallia erosa; Hampson, 1901, Cat. Lepid. Phalaenae Br. Mus. 3: 361. Text at https://archive.org/details/catalogueoflepid03brituoft/page/361/mode/1up?view=theater
Pericallia erosa; Rothschild, 1910, Novit. Zool. 17 (2): 171; Text at https://archive.org/details/novitateszoologi17lond/page/171/mode/1up?view=theater
Hampson, FBI, Vol. 2: pg. 19,#1209.
Pangora erosa; Moore, 1882, Lepid. Ceylon 2 (1): 72, pl. 107, f. 1, 1a-b. Text at https://archive.org/details/lepidopteraofcey02moor/page/72/mode/1up?view=theater. Plate at https://archive.org/details/lepidopteraofcey02moor/page/n246/mode/1up?view=theater
Seitz, A. (Ed). Macro. Lep. World. Vol. 10. Pg. 256-7, Pl. 25a for females of erosa, rubelliana and distorta.

JD :difficult to be certain this is erosa. The oblique band & stripe mentioned in the OD are not evident, check https://www.inaturalist.org/observations?place_id=any&taxon_id=465025