Chrysolina banksi (St Davids)

Adults can be found on their hostplants which are Black Horehound (Ballota nigra) and Narrow-leaved Plantain (Plantago lanceolata)

Chrysolina is a large genus of leaf beetles in the subfamily Chrysomelinae. The species Chrysolina cerealis and C. graminis are protected in the United Kingdom

Sorry there is little information on this beetle.