Oeonistis is a genus of moths in the family Erebidae first described by Jacob Hübner in 1819. They are found in India, Sri Lanka, Myanmar, Borneo and other minor islands of Oceania.
Palpi porrect (extending forward), the second joint fringed with hair. Antennae of male bipectinated, with short branches and with a bristle from the end. Forewing very long and narrow. Vein 3 from before angle of cell. Veins 4 and 5 from angle, vein 6 from upper angle and veins 7 to 9 stalked. Areole absent. Hindwing with veins 4 and 5 stalked. Veins 6 and 7 on a short stalk and vein 8 from middle of cell.[1]
. George Hampson . 1894 . The Fauna of British India, Including Ceylon and Burma: Moths Volume II . Taylor and Francis . Biodiversity Heritage Library.