The Polyctenidae are a rarely collected family of parasitic bugs of the superfamily Cimicoidea. Polyctenidae species or bat bugs are obligate, hematophagous ectoparasites of bats. These insects are not to be confused with cimicid bat bugs, which are members of the family Cimicidae. A significant relationship appears to occur between the family groups and the species of hosts that indicates co-evolution and specialization.