▁and ▁Finland . ▁ ▁Techn ical ▁description ▁and ▁variation ▁ ▁Fore wing : ▁bas al ▁two - third s ▁black ▁brown , ▁with ▁bas al ▁patch , ▁cost al ▁stre ak , ▁and ▁ren iform ▁st igma ▁fus c ous ▁grey ; ▁crossed ▁at ▁middle ▁by ▁a ▁pale ▁och re ous ▁band ▁ob lique ▁from ▁sub cost al ▁and ▁w iden ing ▁down wards , ▁its ▁outer ▁half ▁yellow ish ; ▁limited ▁extern ally ▁by ▁a ▁b icon ca ve ▁och re ous ▁band , ▁nar ro wer ▁below , ▁followed ▁below ▁ve in ▁ 6 ▁by ▁a ▁broad ▁brown ▁band , ▁on ▁the ▁outer ▁edge ▁of ▁which ▁are ▁three ▁or ▁four ▁irregular ▁black ▁patch es , ▁and ▁above ▁and ▁beyond ▁it ▁on ▁costa ▁a ▁black ▁bl ot ch , ▁sharp ly ▁ang led ▁extern ally ▁on ▁ve in ▁ 6 , ▁these ▁black ▁marks ▁forming ▁the ▁inner ▁edge ▁of ▁a ▁diff use ▁subm arg inal ▁pale ▁line ; ▁terminal ▁area ▁sh aded ▁with ▁brown ▁and ▁fus c ous , ▁with ▁a ▁short ▁black ▁ap ical ▁stre ak ▁and ▁a ▁diff use ▁dark ▁cloud ▁below ▁the ▁middle ; ▁fr inge ▁grey ▁with ▁white ▁base , ▁altogether ▁wh it ish ▁round ▁a pe x : ▁h ind wing ▁o live ▁fus c ous , ▁becoming ▁black ish ▁towards ▁term en ; ▁a ▁white ▁band ▁from ▁costa ▁at ▁one - third ▁to ▁anal ▁angle , ▁and ▁a ▁round ▁white ▁subm arg inal ▁spot ▁in ▁sub med ian ▁fol d ; ▁fr inge ▁bright ly ▁white