Common cockchafer
years for the 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 [...] 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 short hairs, and [...] laid, the oval eggs of the common cockchafer ( Melolontha melolontha ) are 2 x 3 mm, but they increase in size by absorbing water. The larvae (grubs) have