Pediculi are ectoparasites, meaning they live on top of their hosts instead of inside of them. They are small, six-legged insects with claws adapted to clinging onto their host's hairs or clothes. Pediculi mouth-parts are adapted to sucking the host's blood, and in the case of capitis, they are also adapted to eating dermal parts of the host's scalp, neck and eyelids. See the picture in general information, above.