Haematopinus is a genus of insects in the suborder Anoplura, the sucking lice. It is the only genus in the family Haematopinidae, known commonly as the ungulate lice. All known species are of importance in veterinary medicine. These lice are some of the worst ectoparasites of domestic animals. Species infest many domesticated and wild large mammals, including cattle, horses, donkeys, swine, water buffalo, African buffalo, antelope, zebra, deer, and camels. Species include: