silhouette of head human louse. pediculus humanus

agent animal arthropoda avian blood body book bug capitis cartoon clip clipart coloring danger debris disease drawing drawn ectoparasites exopterygota graphic handdrawn head host human humanus illustration insect insecta lice louse mammalian neoptera one outline pale parasit parasite parthenogenetic pediculus phthiraptera pterygota scalp scavengers sebaceous secretions sketch skin vector wingless