chafer
noun
cha·fer ˈchā-fər 
: any of various scarab beetles (such as a cockchafer) that feed on leaves and flowers and whose larvae feed on plant roots
Word History
Etymology
Middle English cheaffer, from Old English ceafor; probably akin to Old English ceafl jowl — more at jowl entry 2
First Known Use
before the 12th century, in the meaning defined above