Thoressa masoni, or Mason's ace is a butterfly in the family Hesperiidae. It was described by Frederic Moore in 1879. It is found in the Indomalayan realm in Burma, Thailand, Laos and Vietnam.[2]
Thoressa masoni, or Mason's ace is a butterfly in the family Hesperiidae. It was described by Frederic Moore in 1879. It is found in the Indomalayan realm in Burma, Thailand, Laos and Vietnam.