9   mm . ▁The ▁for ew ings ▁are ▁in ▁white ▁in ▁males ▁and ▁och re ous - wh it ish ▁in ▁females . ▁There ▁is ▁a ▁faint ▁grey ▁ob lique ▁interrupted ▁line ▁near ▁the ▁base ▁and ▁a ▁small ▁dark ▁grey ▁spot ▁on ▁the ▁costa ▁at ▁one - four th , ▁where ▁a ▁very ▁irregular ▁ob lique ▁interrupted ▁faint ▁grey ▁line ▁cross es ▁the ▁wing . ▁An ▁o val ▁black ▁spot ▁is ▁found ▁on ▁the ▁upper ▁angle ▁of ▁the ▁cell , ▁with ▁a ▁dot ▁beneath ▁its ▁posterior ▁extrem ity . ▁A ▁fas cia ▁composed ▁of ▁two ▁dark ▁fus c ous ▁stre aks ▁suff used ▁together ▁with ▁fus c ous ▁is ▁found ▁from ▁the ▁costa ▁beyond ▁the ▁middle ▁to ▁the ▁d ors um ▁before ▁the ▁torn us , ▁cur ved ▁out wards ▁around ▁the ▁dis cal ▁spot ▁and ▁the ▁posterior ▁edge ▁obt us ely ▁ang ulated ▁above ▁the ▁middle , ▁wid est ▁and ▁dark est ▁towards ▁the ▁d ors um . ▁There ▁is ▁a ▁fus c ous ▁terminal ▁band ▁mixed ▁with ▁white , ▁only ▁separated ▁from ▁the ▁preceding ▁on ▁the ▁lower ▁three - four th s ▁by ▁a ▁white ▁line , ▁ed ged ▁on ▁the ▁term en ▁by ▁a ▁white ▁to oth ed ▁line ▁with ▁the ▁inter spaces ▁filled ▁with ▁dark ▁fus c ous . ▁The ▁h ind w ings ▁in ▁males ▁are ▁och re ous - wh it ish , ▁in ▁females ▁light ▁grey ish . ▁There ▁is ▁a ▁small ▁irregular ▁dark ▁fus c ous ▁spot ▁on ▁the ▁costa ▁before ▁the ▁a pe