Juveniles ofLiocheles australasiaeborn in the laboratory were kept separate after leaving their mother's backs early in the second instar. They usually developed through five and sometimes six juvenile stages, becoming pregnant shortly after the final molt without having been impregnated by males. Therefore they must become pregnant parthenogenetically. Most of the juveniles became pregnant at about 15 months after birth, but a few required twice as long to mature and to become pregnant, resulting in two age classes at maturity.