A French encyclopedia entry on the silkworm from the Nouveau Larousse Illustré, with a plate of its life stages. The text covers the rearing cycle: incubation of eggs, the four molts, the spinning of the cocoon and the metamorphosis into chrysalis and moth. It also gives a brief history of sericulture from China through India, Byzantium under Justinian, Italy and France under Henri IV, and describes the Chinese method of raising worms on the trees. The main silkworm diseases (pébrine, flacherie, muscardine) are named.