Ten Lined June Beetle

Coleoptera: Scarabaeidae

June Beetles (May beetles, July Beetles) are

found in the Subfamily Melolonthinae of the Scarab

family. The Ten Lined June Beetle, Polyphylla  

decemlineata ( Say) is very common throughout the

PNW Region as a root feeding white grub which feeds

on roots of crops, garden, and ornamental plants. The

beetles emerge in the summer, usually in late June

through July in SE Washington. They are large

beetles of 22 to 28 mm size, which are attracted to lights at

night and are found under the lights in the daylight. They

hiss and squeal when handled. Males (see head jpg) have l

arge feathery antennae to detect the female (whole beetle

image) pheromones.