The may-bug(Latin. Melolontha) common name of two species of beetles in the genus Melolontha family scarab; Pest plants. Length 22-29 mm. Body: black elytra are reddish-brown opuà ¡eny white hairs. (Latin. Melolontha) chafer, Maisky khrushch, common name of two species of beetles in the genus Melolontha family scarab; Pest plants. Length 22-29 mm. Body: black elytra are reddish-brown opuà ¡eny white hairs.