Rivula basalis

Rivula basalis Hampson, 1891, Illustr. Typical Specimens Lepid. Het. Colln. Br. Mus., 8: 101, 10. Text at https://www.biodiversitylibrary.org/item/180088#page/111/mode/1up.
MON Part 3, pl. 90/24.
MOT, Vol. 3, Pl. 2/7.
MOT, Vol 3, Part 2, Pl. 5/50.
FBI, Hampson, Vol. 2, pg. 335, # 2103. Nilgiris; Sri Lanka.
https://www.inaturalist.org/taxa/496099-Rivula-basalis
https://www.mothsofborneo.com/part-17/rivulinae/rivulinae_1_13.php
Similar species
Rivula simulatrix Hampson, 1912
https://www.inaturalist.org/taxa/523583-Rivula-simulatrix
https://www.mothsofborneo.com/part-17/rivulinae/rivulinae_1_14.php
Rivula simulatrix Hampson, 1912, J. Bombay nat. Hist. Soc., 21: 1242. Text at https://www.biodiversitylibrary.org/page/30222675#page/604/mode/1up

Presence of a dark shading around the bipunctate discal mark, this tending to be more intense in basalis, means this is likely to be this species, though the HW cleft near tornus of male is probably the better feature for separation. Possibly, cf, as separation from simulatrix is best done by genitalia.