leaf beetle

noun
any of numerous, often brightly colored beetles of the family Chrysomelidae, that feed on the leaves of plants, the larvae of which infest the roots, stem, and leaves.

Origin:
1850–55

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World English Dictionary
leaf beetle
 
n
any of a large family of beetles (Chrysomelidae) that includes more than 25,000 species, mostly leaf feeders and mostly brightly coloured, with a metallic sheen. It includes the notorious Colorado beetle, the bloody-nosed beetle and the flea beetles (Phyllotreta species) which attack young cabbage plants

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Encyclopedia Britannica
Encyclopedia

leaf beetle

any of approximately 25,000 species of beetles (insect order Coleoptera) that occur throughout the world but are concentrated in the tropics. They are oval, short-legged, with the antennae about half the body length, and tend to be less than 12 mm (0.5 inch) long. Many are important leaf feeding pests that feed on crop and ornamental plants. The family is divided into numerous subfamilies.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
About the size and shape of a sunflower nutmeat, an elm leaf beetle is a feeble creature in my experience, breaking at any touch.
The lily leaf beetle is an invasive species that dines on and destroys ornamental lily plants.
Cereal leaf beetle populations were large, but damage was difficult to determine.
They determined that feeding by the soybean leaf beetle was the primary culprit.
Image for leaf beetle
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