What is "flea beetle"

n. Any of the small jumping beetles of the leaf beetle family.

n. any small leaf beetle having enlarged hind legs and capable of jumping

Flea beetle is a general name applied to the small, jumping beetles of the leaf beetle family (Chrysomelidae). They make up the tribe Alticini, which is a part of the subfamily Galerucinae, though they were historically classified as a subfamily in their own right. Though most tribes of the Galerucinae are suspect of rampant paraphyly in the present delimitation, the Alticini seem to form a good clade at least for the most part.