Adult male head louse, Pediculus humanus capitis.

Closeup of male human head louse, <i>Pediculus humanus capitis.</i> on human hair; Namur, Belgium Credit: Gilles San Martin; Licensed Under a Creative Commons Attribution-ShareAlike 2.0 Generic License.
Credit: Gilles San Martin; Licensed Under a Creative Commons Attribution-ShareAlike 2.0 Generic License.