Complex sentence: The silkworm larva is one of these, with mulberry leaves being the only food consumed; more often, an insect is oligophagous, being restricted to a few closely related species usually in the same plant family.
Split into simpler sentences: The silkworm larva is one of these, with mulberry leaves being the only food consumed. More often, an insect with a limited host range is oligophagous, being restricted to a few closely related species, usually in the same plant family.