Bombyx is the genus of true silkmoths or mulberry silkmoths of the family Bombycidae. For a few thousand years, people only recognised two species, but then several other less important species were discovered, and the genus contains two tested hybrid species, a semi-natural cross between a female Bombyx mori and a male Bombyx mandarina, and another hybrid the other way around from the first.

Species

Bombyx horsfieldi (Moore, 1860)
Bombyx huttoni Westwood, 1847
Bombyx incomposita van Eecke, 1929
Bombyx lemeepauli Lemée, 1950
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 rotundapex Miyata & Kishida, 1990
Bombyx shini Park and Sohn, 2002
Hybrids

Bombyx Hybrid, a hybrid between B. mori and B. mandarina
Bombyx second Hybrid, a hybrid between a male B. mori and a female B. mandarina. It is completely dependent on humans to survive.
Food

The caterpillars feed on Moraceae, especially on mulberries (Morus).

Domesticated silkworms may be fed artificial mulberry chow.