Polyptychus rougeoti 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 Gabon

Gabon

Gabon , officially the Gabonese Republic is a state in west central Africa sharing borders with Equatorial Guinea to the northwest, Cameroon to the north, and with the Republic of the Congo curving around the east and south. The Gulf of Guinea, an arm of the Atlantic Ocean is to the west...

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The forewings are long and narrow, apex acute. The ground colour of the upperside is wood brown, mottled with olive yellow at the costa, the inner margin and in the subapical area. There is a large dark olive basal spot, and a paler olive spot at the inner margin and a triangular olive spot at the costa, before the apex. The underside of the forewings is wood brown, but much paler towards outer margin. The upperside of the hindwings is wood brown, paler at the tomus, where there is a dark brown spot. There is a long brown streak parallel to inner margin.