Agrilus biguttatus is a species of beetle in the family Buprestidae, the jewel beetles. Common names include oak splendour beetle, oak buprestid beetle, and two-spotted oak borer. This beetle is known as a pest that causes damage to oak trees and is a major factor in oak decline.

The adult beetle is 8 to 13 millimeters long. It is metallic green in color with a black or yellow cast. There is a pair of white spots on the inner edges of the elytra. The larva is a creamy white color and measures up to 43 millimeters in length. The first thoracic segment is enlarged. The grub is legless and has a pair of horns on its last abdominal segment. The beetles have an average lifespan of 2 months, but some may live upwards of 5 months.

...