素弄蝶 Indian Palm Bob (Suastus gremius)
Reference :
http://www.afcd.gov.hk/tc_chi/conservation/hkbiodiversity/database/popup_record.asp?id=2700&lang=tc
郊野情報 蝴蝶篇 Hong Kong Butterflies 3rd Edition - Phillip Yik-fui Lo 羅益奎 / 許永亮 - P.132-133