The new females, now impregnated, eat their way out of their mother's body so that they can emerge to find new thrips eggs, killing their mother in the process (though the mother may be only 4 days old at the time), starting the cycle again.
The newly fertilized females, now pregnant, consume their way out of their mother's body to gain freedom and locate new thrips eggs, ultimately killing their mother in the process (although the mother may be only a few days old at that time), initiating the cycle anew.