 Females of many spider species , including P. labiata , : 33 : 517 emit volatile pheromones into the air , and these generally attract males from a distance . : 36 The silk draglines of female jumping spiders also contain pheromones , which stimulate males to court females and may give information about each female 's status , for example whether the female is juvenile , subadult or mature . : 43 Pheromones may help to find jumping spiders ' nests , which are usually hidden under rocks or in rolled leaves , making them difficult to be seen . : 36 
