▁Salvador ), ▁and ▁one ▁or ▁two ▁species ▁occur ▁in ▁the ▁Ant illes . ▁ ▁Eu ar esta ▁b ull ans ▁has ▁been ▁introduced , ▁perhaps ▁accident ally , ▁from ▁South ▁America ▁to ▁California ▁and ▁Arizona , ▁southern ▁Europe , ▁the ▁Middle ▁East , ▁South ▁Africa ▁and ▁Australia , ▁where ▁it ▁attacks ▁sp iny ▁co ck le bur ▁( X anth ium ▁sp inos um ). ▁E . ▁a equ alis ▁has ▁been ▁introduced ▁to ▁F iji ▁and ▁Australia , ▁to ▁act ▁as ▁a ▁bi ological ▁control ▁agent ▁of ▁common ▁co ck le bur ▁( X anth ium ▁str um arium ). ▁E . ▁bel la ▁was ▁released ▁in ▁Europe ▁to ▁control ▁rag we ed ▁( Am b ros ia ▁ar tem isi ifolia ), ▁but ▁did ▁not ▁become ▁established ▁there . ▁ ▁Species ▁Fif teen ▁species ▁are ▁recogn ised ▁in ▁the ▁genus ▁Eu ar esta : ▁ ▁North ▁America ▁E . ▁a equ alis ▁( Lo ew , ▁ 1 8 6 2 ) ▁E . ▁bel la ▁( Lo ew , ▁ 1 8 6 2 ) ▁E . ▁bell ula ▁Snow , ▁ 1 8 9 4 ▁E . ▁fest iva ▁Lo ew , ▁ 1 8 6 2 ) ▁E . ▁j ones i ▁Cur ran , ▁ 1 9 3 2 ▁E . ▁st ellig era ▁( Co qu ille tt , ▁ 1 8 9 4 ) ▁E . ▁st ig mat ica ▁( Co qu ille tt , ▁ 1 9 0 2 ) ▁E . ▁tap