Probably a female. Color is much lighter than the regular one. Reference : http://www.afcd.gov.hk/tc_chi/conservation/hkbiodiversity/database/resultlist.asp?lang=tc ééæ å ± - è´è¶ç¯ Hong Kong Butterflies - 3rd edition - Philip Yik-fui Lo / Wing-leung Hui - AFCD Page 322