Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Bombyx is the genus of true silkmoths or mulberry silkmoths of the family Bombycidae. It contains two species: one natural hybrid and one human-dependent hybrid: Bombyx mandarina, wild silkmoth Bombyx mori, domesticated silkmoth. "Silkworm" is the name usually applied to the caterpillars of this species.They have lost the ability to fly.Bombyx Hybrid, a hybrid between B. mori and B. mandarinaBombyx second Hybrid, a hybrid between a male B. Mori and a female B. mandarina. It is completely dependent on humans to survive. The caterpillars feed on Moraceae, especially on mulberries (Morus).