Arnetta mercara, the Coorg forest hopper or Coorg forest bob,[2] is a species of butterfly belonging to the family Hesperiidae.

[2][3] Upper side: Forewing only with conspicuous conjoined hyaline white apical spots, no discal spots.

Underside: Hindwing varies from dark (wet season form), to a variegated form (dry season form) with central and submarginal grey scaling.

Resembles dry season form of Astictopterus jama.

Uncus undivided This Erionotini-related article is a stub.