Hemeroplanes longistriga 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 Brazil

Brazil

Brazil , officially the Federative Republic of Brazil , is the largest country in South America. It is the world's fifth largest country, both by geographical area and by population with over 192 million people...

 and Ecuador

Ecuador

Ecuador , officially the Republic of Ecuador is a representative democratic republic in South America, bordered by Colombia on the north, Peru on the east and south, and by the Pacific Ocean to the west. It is one of only two countries in South America, along with Chile, that do not have a border...

.

It differs from all other Hemeroplanes

Hemeroplanes

Hemeroplanes is a genus of moths in the Sphingidae family.-Species:*Hemeroplanes diffusa - Rothschild & Jordan 1903*Hemeroplanes longistriga - Rothschild & Jordan 1903*Hemeroplanes ornatus - Rothschild 1894...

species by the very long silver mark on the forewing upperside and lack of yellow bands on the upperside of the abdomen.

There are probably at least two generations per year. Adults have been recorded in December in Brazil.