This image depicts five body lice: Pediculus humanus var. corporis, which from left to right included three nymphal-staged lice, beginning with a stage N1, then N2, and thirdly a N3-staged nymph ...

THERE are three major species of lice. There is the body louse (pediculus humanus corporis), head louse (pediculus humanus capitis) and the crab louse (phthirus pubis). THERE are three major ...