A 1906 entomological article by H. M. Lefroy, Imperial Entomologist at Pusa, on the caterpillar (Caradrina exigua) that destroys newly sown indigo in Behar. It covers the life history, damage at Surat and Pusa, the effect of east and west winds, identification, distribution and natural enemies. Remedies discussed are sowing Java-Natal indigo, using irrigated lucerne as a trap crop surrounded by a trench, and spraying. A colored plate of the insect's stages and a trench cross-section diagram are included.