Cephaloleia dimidiaticornis is a species of beetle of the family Chrysomelidae. It is found in Brazil (São Paulo) and Peru.
Adults reach a length of about 4âÂÂ4.9 mm. Adults are reddish-brown, with the eyes and antennomeres 7âÂÂ11 darker.
Adults have been collected on an unidentified palm (Arecaceae) species.