Pubic lice (Phthirus pubis), also known as "crabs," are one of the many varieties of lice(singular "louse") specialized to live on different areas of different animals. As the name implies, pubic lice are specialized to live in the human pubic hair, but may also live in hair on other areas of the body such as hair on the legs, armpit, mustache, beard, eyebrows, and eyelashes. Infestations of young children are usually on the eyebrows or eyelashes. ...