Sericesthis harti, the yellowhead cockchafer, is a species of beetle of the family Scarabaeidae. It is found in Australia (south-eastern South Australia, southern New South Wales, Victoria).
Description Adults reach a length of about . They are reddish brown to dark brown or black, usually with the head reddish.
Life history The larvae are a pest on cereal crops and pastures. Adults have been recorded from November to early December.
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