noun
leaf beetle
Refers to beetles of the family Chrysomelidae. In everyday contexts, often written in katakana as ハムシ.
庭の木にハムシがついている。
There are leaf beetles on the tree in the garden.
ハムシの幼虫は葉を食べる。
Leaf beetle larvae eat leaves.
The Japanese name ハムシ (葉虫) literally means 'leaf insect', from 葉 (ha, 'leaf') and 虫 (mushi, 'insect'). The katakana spelling is standard for many insect names.