Phalacra sp.
Taxonomic position
Insecta: Lepidoptera: Drepanoidea: Drepanidae: Drepaninae
Habitat / Crop(s) damaged
Coconut and date palm.

Recently, Phalacra vidhisara Walker is noticed defoliating coconut in Tamil Nadu, Southern India. Also, found in neighboring countries like Sri Lanka and Bangladesh.
Images
Adult Adult Specimen identified by: Dr.Ankita Gupta