What is "european chafer"

The European chafer (Rhizotrogus majalis, classified as Amphimallon majalis until 1978) is a beetle of the Scarabaeidae family. Formerly found only in continental Europe, this invasive species is now found at temperate latitudes in North America, where they are commonly called June bugs. The large, white grubs of R. majalis feed on the roots of most cool-latitude grasses, both wild and cultivated. This has made the European chafer an enemy of North American lawns.