Arhopala perimuta
Arhopala perimuta, the yellowdisc oakblue or yellowdisc tailless oakblue, is a species of butterfly belonging to the lycaenid family described by Frederic Moore in 1857. It is found in Southeast Asia.
A. perimuta has been established as the type of a separate genus: Darasana Moore,recognizable by the margin of the wings being on all sides rounded, whereby the tailless hindwing appears almost exactly oviform; only the apex of the forewing forms a slight point. Upper surface of male glaringly sky-blue with a black margin of about 1 mm width, under surface violettish-brown with dark, curved, almost parallel transverse lines.