June bug noun6 •Any of several species of beetles. •Phyllophaga, a genus of beetles in the subfamily Melolonthinae of the family Scarabaeidae, also known as June beetles. •green June beetle (Cotinis nitida), of the southeastern United States •ten-lined June beetle (Polyphylla decemlineata), of the western United States and Canada •fig-eater or figeater beetle (Cotinis mutabilis), of the western and southwestern United States •European chafer (Rhizotrogus majalis/Amphimallon majalis), a beetle native to continental Europe, but now also in North America formsJune bugs