Xylophanes pearsoni 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 eastern 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...

.

The length of the forewings is about 35 mm for males and about 36 mm for females. It is similar to Xylophanes libya

Xylophanes libya

The Libya Sphinx is a moth of the Sphingidae family. It is known from southern Texas, Mexico, Belize, Guatemala, Panama and from Venezuela south and west to Bolivia and Paraguay....

, except for some differences in the pattern of the forewing and hindwing upperside. Females are similar to males but have broader and rounder forewings and a pattern which is more contrasting.

The larvae probably feed on Rubiaceae

Rubiaceae

The Rubiaceae is a family of flowering plants, variously called the coffee family, madder family, or bedstraw family. The group contains many commonly known plants, including the economically important coffee , quinine , and gambier , and the horticulturally valuable madder , west indian jasmine ,...

 and Malvaceae

Malvaceae

Malvaceae, or the mallow family, is a family of flowering plants containing over 200 genera with close to 2,300 species. Judd & al. Well known members of this family include okra, jute and cacao...

species.