Manduca brasiliensis 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...

, Argentina

Argentina

Argentina , officially the Argentine Republic , is the second largest country in South America by land area, after Brazil. It is constituted as a federation of 23 provinces and an autonomous city, Buenos Aires...

 and Paraguay

Paraguay

Paraguay , officially the Republic of Paraguay , is a landlocked country in South America. It is bordered by Argentina to the south and southwest, Brazil to the east and northeast, and Bolivia to the northwest. Paraguay lies on both banks of the Paraguay River, which runs through the center of the...

.

It is similar to Manduca scutata

Manduca scutata

Manduca scutata is a moth of the Sphingidae family. It is found from Venezuela south to Bolivia and northern Argentina.The wingspan is about 95 mm. Adults have been recorded in November....

, but smaller, the sides of the thorax and upperside of the head and forewing are more greyish. Furthermore, there are smaller black spots on the abdomen underside, the black discal patches on the forewing upperside are shorter, there is a broader black median band on the hindwing upperside and the black lines on the hindwing underside are more distinct.