Polyptychoides niloticus 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 found from Zambia

Zambia

Zambia , officially the Republic of Zambia, is a landlocked country in Southern Africa. The neighbouring countries are the Democratic Republic of the Congo to the north, Tanzania to the north-east, Malawi to the east, Mozambique, Zimbabwe, Botswana and Namibia to the south, and Angola to the west....

 to Sudan

Sudan

Sudan , officially the Republic of the Sudan , is a country in North Africa, sometimes considered part of the Middle East politically. It is bordered by Egypt to the north, the Red Sea to the northeast, Eritrea and Ethiopia to the east, South Sudan to the south, the Central African Republic to the...

, Ethiopia

Ethiopia

Ethiopia , officially known as the Federal Democratic Republic of Ethiopia, is a country located in the Horn of Africa. It is the second-most populous nation in Africa, with over 82 million inhabitants, and the tenth-largest by area, occupying 1,100,000 km2...

 and Somalia

Somalia

Somalia , officially the Somali Republic and formerly known as the Somali Democratic Republic under Socialist rule, is a country located in the Horn of Africa. Since the outbreak of the Somali Civil War in 1991 there has been no central government control over most of the country's territory...

.

This species is subject to considerable seasonal and climatic variation. Extreme dry season specimens and specimens from arid areas are very small, sandy, with all markings faint or obsolete and more regular wing margins. Specimens from moister areas, or taken in the wet season are consistently larger, darker grey, more heavily marked and have scalloped wing margins. Both forms may occur in the same areas.

The length of the forewings is 28-43 mm for males and 34-52 for females. The ground colour is grey with a black basal dot. The antemedial, postmedial and submarginal lines are straight and clearly defined. The hindwings are grey, but darker near the inner margin. In the extreme dry form (niloticus) the ground colour is pale sandy.

Subspecies

• Polyptychoides niloticus niloticus
• Polyptychoides niloticus ponens Pierre, 1989 (Tchad)