Definition of June beetle in English:

June beetle

noun

North American
  • 1A brown or brownish-black chafer of the large genus Phyllophaga (formerly Lachnosterna), found throughout N. America (also called June bug, May beetle).

  • 2(More fully "green June beetle") a green and brown chafer of the genus Cotinis, of the southern U.S. (also called June bug).

  • 3A striped chafer of the genus Polyphylla.

Origin

Mid 19th century; earliest use found in Henry Mayhew (1812–1887), author and social reformer.