 Adult P. labiatas sometimes uses " propulsive displays " , in which an individual threatens a rival of the same sex , and unreceptive females also threaten males in this way . P. labiata females are extremely aggressive to other females , trying to invade and take over each other 's webs , which often results in cannibalism . A test showed that they minimise the risk of confrontations by using silk draglines as territory marks . Another test showed that females can recognise the draglines of the most powerful fighters and prefer to move near the draglines of less powerful ones . Females try to kill and eat their mates during or after copulation , while males use tactics to survive copulation , but sometimes females outwit them . Before being mature enough to mate , juvenile females mimic adult females to attract males as prey . When hunting , P. labiata mature females emit olfactory signals that reduce the risk that any other females , males or juveniles of the same species may contend for the same prey . 
