1) Arthropod family 2) Family chrysomelidae 3) Leaf beetles 
Chrysomelidae is the leaf beetles family of insects of the order Coleoptera. They are one of the largest families of beetles, with over 250 British species. The Chrysomelidae are related to the longhorn beetles (Cerambycidae) and like them are vegetarian, feeding on plants. Leaf beetles vary in form, but most are convex, oval or more or less round ...
[n] - leaf beetles
family Chrysomelidae noun leaf beetles