 Adult Psylliodes luridipennis beetles are invariably found on the Lundy cabbage ( Coincya wrightii ) , a species endemic to the island of Lundy , where they feed on the leaves . They are not found on other locally occurring plants . However , researchers were also able to lure the beetles onto other <unk> taken from gardens . Two other taxa are known only from Lundy cabbages — the true weevil Ceutorhynchus contractus var. pallipes and an undescribed race of the flea beetle Psylliodes napi — making the plant unique to Britain as the only endemic species which is the exclusive host to endemic insect species . However , the Lundy cabbage is also host to a diverse variety of other invertebrate species . 
