Medythia suturalis

Medythia suturalis, commonly known as striped bean flea beetle, is a species of leaf beetle found in China, India, Sri Lanka, Japan, Laos, Myanmar, North Korea, Philippines, South Korea, Taiwan, Vietnam, and Russia.

It is a major pest of beans and peas.

Description
Body length is about 2.8 mm. Anterior margin of labrum is entire. Postantennal tubercles are elongate. Black elytral stripe extend to the humerus.