Melolontha hippocastani, commonly known as the chestnut chafer, is a species of beetle belonging to the family Scarabaeidae. It is found in Europe, particularly in deciduous forests and orchards. The adult beetles are medium-sized, measuring around 2.5 to 3 centimeters in length, and have a dark brown or black coloration. The larvae of Melolontha hippocastani feed on the roots of various plants, including chestnut trees, hence the common name.