Suastus, whose members are called palm bobs, is a genus of grass skipper butterflies in the family Hesperiidae.
Species Suastus gremius (Fabricius, 1798) South India, Northwest Himalayas to Burma, Thailand, Laos, Vietnam, Hainan, Hong Kong, Formosa, Langkawi, Malaya, Sri Lanka, Sumba, Indian palm bob Suastus minuta (Moore, 1877) South India, Sikkim to Burma, Sri Lanka, Thailand, Laos, Hainan, Vietnam and Malaya, Small palm bob Suastus everyx (Mabille, 1883) Burma, Thailand, Malaya, Borneo, Sumatra, Java, Bali, White palm bob Suastus migreus (Semper, 1892) Philippines
Biology The larvae feed on Palmae including Arenga, Borassus, Caryota, Chamaerops, Cocos, Licuala, Phoenix, Rhapis, Trachycarpus, Calamus Robinson, G. S., P. R. Ackery, I. J. Kitching, G. W. Beccaloni & L. M. Hernández, 2010. Hosts - A Database of the World's Lepidopteran Hostplants. Natural History Museum, London. nhm hosts
References
Natural History Museum Lepidoptera genus database Suastus Moore, 1881 at Markku Savela's Lepidoptera and Some Other Life Forms