The rice crop in the Cauvery delta region of Tamil Nadu State in India was found to be damaged by a chrysomelid, Cryptocephalus sehestedti Fabricius Chrysomelidae: Coleoptera). The identity of this insect pest that invaded the crop at the reproductive stage was confirmed by K.D. Prathapan of Kerala Agricultural University and K. Gunathiliagaraj of Tamil Nadu Agricultural University. The beetles were found to feed on the spikelets at the flowering and milky stages of the crop. The adult beetle is 2.35 mm long, hemispherical, and yellowish orange with a longitudinal black streak in the mid-elytra (Fig. 1). The beetles were scattered and damage was noticed in patches. The adults escape by making swipe movements when disturbed. Feeding site and host of the larva cannot be established.