The Louse
YES, John, lice are bugs, and very mean bugs too.
They have lived at the expense of other creatures so long that they cannot exist unless they have a living body to feed on.
Here is a picture of one very much enlarged. No wings, no beauty, a pale white thing, all claws and mouth.
It has a long sucking tube by which it pierces the skin, and a sucking stomach by which it pumps the blood into its mouth.
Such creatures are called parasites.
Yes, bed bugs are parasites too.
Besides the lice that live on human beings, there are species that infest animals.