Common cockchafer
larvae to fully develop. The grubs are 10 to 20 mm in the first autumn, 30 to 35 mm by the following autumn, and 40 to 46 mm in the spring of their third [...] stages: egg, three larval instars, a pupal instar and the adult beetle. The adult beetle is 25 to 30 mm long, with a dark head, black pronotum covered with [...] trees, mainly on oak, maple, beech and plum. Life cycle and appearance of Common cockchafer The life cycle of the common cockchafer ( Melolontha melolontha