Diet

• Adults feed on flower nectar, as is typical of the grass skippers.

• The larval food plants are not well established, and a specific host plant is best left unspecified rather than assuming a grass or other plant family.

Habitat

• It is associated with tropical forest environments.

• As a member of the grass-skippers, it is likely to use forest edges, clearings and other areas where suitable larval grasses and nectar plants occur.

Description

• Carystus argus is a medium-sized, brown grass skipper with a relatively broad-winged appearance.

• The underside of the hindwing has a distinctive arrangement of black spots, forming a compact cluster toward the central portion of the wing. This pattern is particularly useful for separating it from the superficially similar Oligoria argus.

• The wings are predominantly brown, with subtle pale markings and a relatively subdued overall appearance.

• Its identification can be challenging because of its similarity to other brown Hesperiini.