Eupanacra treadawayi 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 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...

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The length of the forewings is 26.5-28 mm. It is similar to Eupanacra angulata

Eupanacra angulata

Eupanacra angulata is a moth of the Sphingidae family. It is known from Sumatra.The forewing upperside is brown with darker brown margins. The prominent postmedian band continuous from the inner margin to the costa. There is a large, irregular, triangular area on the outer margin emphasized by...

, except for differences in the tegulae (which have light yellow metallic scales) and the upperside of the abdomen (which has silvery scales), as well as the form of the forewing. Differences on the upperside of the forewing are limited to the form of the discal dot and several of the lines. The hindwing underside has a bright discal spot consisting of silver and gold scales.