Eupanacra elegantulus is a moth

Moth

A moth is an insect closely related to the butterfly, both being of the order Lepidoptera. Moths form the majority of this order; there are thought to be 150,000 to 250,000 different species of moth , with thousands of species yet to be described...

 of the Sphingidae

Sphingidae

Sphingidae is a family of moths , commonly known as hawk moths, sphinx moths and hornworms, that includes about 1,200 species . It is best represented in the tropics but there are species in every region . They are moderate to large in size and are distinguished among moths for their rapid,...

 family. It is known from south-east Asia, including Singapore

Singapore

Singapore , officially the Republic of Singapore, is a Southeast Asian city-state off the southern tip of the Malay Peninsula, north of the equator. An island country made up of 63 islands, it is separated from Malaysia by the Straits of Johor to its north and from Indonesia's Riau Islands by the...

, Thailand

Thailand

Thailand , officially the Kingdom of Thailand , formerly known as Siam , is a country located at the centre of the Indochina peninsula and Southeast Asia. It is bordered to the north by Burma and Laos, to the east by Laos and Cambodia, to the south by the Gulf of Thailand and Malaysia, and to the...

, Malaysia, Indonesia

Indonesia

Indonesia , officially the Republic of Indonesia , is a country in Southeast Asia and Oceania. Indonesia is an archipelago comprising approximately 13,000 islands. It has 33 provinces with over 238 million people, and is the world's fourth most populous country. Indonesia is a republic, with an...

 the Philippines

Philippines

The Philippines , officially known as the Republic of the Philippines , is a country in Southeast Asia in the western Pacific Ocean. To its north across the Luzon Strait lies Taiwan. West across the South China Sea sits Vietnam...

.

It is similar to Eupanacra mydon, except for the pattern elements found on the upperside of the forewing which are much clearer. Furthermore, the discal spot is larger in males and more prominent in females since these have a paler ground colour. There are two rows of black dots and a large black spot on the underside of the abdomen.

The larvae have been recorded feeding on Dieffenbachia

Dieffenbachia

Dieffenbachia is a genus of tropical plants in the Family Araceae noted for their patterned leaves. Members of this genus are popular as houseplants because of their tolerance for shade. The common name is "dumb cane" due to its poisoning effect on the throat due to raphides...

, Syngonium

Syngonium

Syngonium is a genus of about 36 species of flowering plants in the family Araceae, native to tropical rain forests in Central and South America. They are woody vines growing to heights of 10–20 m or more in trees...

and Monstera deliciosa

Monstera deliciosa

Monstera deliciosa is a creeping vine native to tropical rainforests of southern Mexico south to Colombia.Common names include Ceriman, Swiss Cheese Plant , Fruit Salad Plant, Monster fruit, Monsterio Delicio, Monstereo, Mexican Breadfruit, Monstera, split-leaf philodendron, Locust and Wild Honey,...

. Young larvae are slender, pale green and have a straight pale pink spine at the end of their bodies. Feeding takes place at the underside of the leaves of their host. They rest near the base of the stems. There are green and brown forms of the last instar larvae. Pupation takes place in a loose silken cocoon, which includes some debris.