| 1. | Also called May beetle. any of several large, brown beetles of the genus Phyllophaga, of the scarab family, appearing in late spring and early summer. |
| 2. | green June beetle. |
| 3. | Chiefly Northern and North Midland U.S. a firefly. |
| June beetle n. Any of various large North American scarabaeid beetles of the subfamily Melolonthinae, appearing in late spring and having larvae that are destructive to vegetation. Also called June bug, May beetle. |
| May beetle n. See June beetle. |