A new species of Chaeridiona Baly (Coleoptera: Chrysomelidae: Cassidinae: Oncocephalini) infesting ginger (Zingiber officinale Roscoe) and turmeric (Curcuma longa L.) in India and redescription of Chaeridiona pseudometallica Basu Shameem, K. M. Prathapan, K. D. Zootaxa 2014 3815 4 575 582 62LQ8 Baly Baly [456,672,1129,1155] Insecta Chrysomelidae Chaeridiona Animalia Coleoptera 5 580 Arthropoda genus    1 Exterior apical angle of elytra angulate or denticulate (Figs 1 & 2)............................................... 2  - Exterior apical angle of elytra rounded (Figs 6 & 7)......................................................... 3   2 Dorsum dark brown with purplish tinge; elytral costae 1–4 interrupted.................................  C. piceaBaly  - Dorsum metallic emerald green to dull green except coppery brown laterally and preapically; elytral costa three interrupted..........................................................................................  C. mayuri  n. sp.   3 Elytra distinctly tuberculate; costae not visible between tubercles; dorsum brown, without metallic sheen.................................................................................................  C. tuberculataUhmann  - Elytra not tuberculate; costae visible; dorsum with metallic sheen.............................................. 4   4 Anterolateral pronotal angle with single tooth (Fig. 8); length 3.2–3.5 mm.....................  C. pseudometallicaBasu  - Anterolateral pronotal angle with two teeth (Fig. 3); length 4.3–5.0 mm..............................  C. metallicaBaly