Clanis hawkeri Joicey & Talbot, 1921, Entomologist 54: 106. Type locality: French Indo-China [Laos/Cambodia/Vietnam].
Synonym. Clanis hawkeri Joicey & Talbot, 1921.
Found at altitudes between 888 and 2800m.
China: 7.vi (Yunnan). In Thailand, O. hawkeri flies between late March and early May at the end of the dry season (I. J. Kitching, unpublished data).
Larval hostplants. Unknown.
China: Yunnan (Shuangjiang, 888m); Hainan.
China (Yunnan, Hainan), northern Thailand, Laos and northern Vietnam (Inoue, Kennett & Kitching,  1997).
Holarctic; eastern Palaearctic region. Pleistocene refuge: Monocentric -- Yunnan refugium.