Matapa aria, commonly known as the Common Redeye, is a butterfly

Butterfly

A butterfly is a mainly day-flying insect of the order Lepidoptera, which includes the butterflies and moths. Like other holometabolous insects, the butterfly's life cycle consists of four parts: egg, larva, pupa and adult. Most species are diurnal. Butterflies have large, often brightly coloured...

 belonging to the family Hesperiidae.

Description

See glossary

Glossary of Lepidopteran terms

This glossary describes the terms used in the formal descriptions of insect species, jargon used mostly by professionals or entomologist....

 for terms used

Male and female chocolate brown.
Male. Upperside, pale brown ; forewing with a short impressed comma-like grey streak obliquely beneath the cell. Cilia yellowish white. Underside bright ferruginous brown. Palpi ferruginous brown.
Female. Upperside dark chocolate brown without the impressed streak ; cilia of hindwing pale orange yellow. Underside bright ferruginous brown. The larvae feed on Bambusa striata, Ochlandra travancorica and Ochlandra scriptoria.