Review of the bicolora Fang and binghami Hampson species-groups of the genus Ovipennis Hampson with descriptions of five new species from Southwestern China and Indochina (Lepidoptera, Erebidae, Arctiinae, Lithosiini)

The Ovipennis bicolora Fang, 1986 and Ovipennis binghami Hampson, 1903 species-groups are reviewed. The identities of the records of O. binghami reported outside of its type locality are clarified. Ovipennis bicolora is rediscovered with the male and female genitalia illustrated for the first time. The male and female genitalia of O. thomasi CernATIN SMALL LETTER Y WITH ACUTE, 2009 are illustrated for the first time and its specific status is confirmed. Five new species are described: O. hanae S.-Y. Huang, Volynkin & CernATIN SMALL LETTER Y WITH ACUTE, sp. n. (Southwestern China), O. regina Volynkin, CernATIN SMALL LETTER Y WITH ACUTE, S.-Y. Huang & Saldaitis, sp. n. (Northern Thailand and Southwestern China), O. takia Volynkin, S.-Y. Huang & CernATIN SMALL LETTER Y WITH ACUTE, sp. n. (Western and Central Thailand), O. kitchingi Volynkin, S.-Y. Huang & CernATIN SMALL LETTER Y WITH ACUTE, sp. n. (Northern Thailand), and O. sapa Volynkin, S.-Y. Huang, CernATIN SMALL LETTER Y WITH ACUTE & Saldaitis, sp. n. (Northern Vietnam). Adults and genitalia of the new species are illustrated and compared with its congeners.