Euthalia monina, the powdered baron or Malay baron, is a species of nymphalid butterfly. The species was first described by Frederic Moore in 1859.
The wingspan of these butterflies can reach about 50 - 70 mm. The males of Euthalia monina have blackish or dark brown wings, with a blue-green iridescence on the outer part. The wings of the females are dark brown with pale greyish markings.
Known host plants of the caterpillars include: Clidemia hirta (Melastomataceae), Diospyros melanoxylon (Ebenaceae), Macaranga hullettii, Mallotus subpeltatus (Euphorbiaceae), and Shorea robusta (Dipterocarpaceae).
Distribution and habitat
This species can be found in Asia, mainly in Borneo, Sumatra, Java, Peninsular Malaya, Sikkim - Assam, Myanmar, Cambodia and Thailand. This butterfly prefers small clearings, glades and trails in primary rainforests, at an elevation of 0 - 1000 m above sea level.