Both females and males have stridulatory organs of the type where the pedipalp rubs against the chelicera, and no morphological differences in these organs have been observed between the sexes. Females also have a sternum projection, which is thought to play an important role in mate selection by improving females’ control over copulation. Females have swollen pedipalps that resemble the pedipalps of a male before his final molt. Immature members of the species resemble adults. pluchei have long fragile legs with black and white circles around the joints. Males and females of the species are approximately the same size, with males ranging between 5–7 mm and females ranging between 5-7.5 mm. pluchei, females also possess stridulatory organs, and both sexes engage in stridulation. pluchei is that while in many species of spiders, stridulation commonly occurs by males during sexual encounters, in H. Although some members of the species live in solitary webs, the majority join already existing webs and migrate to new webs multiple times throughout the course of their lives. It is considered a common household spider and builds its nest in attics, basements, and eaves of houses. Holocnemus pluchei, commonly known as the marbled cellar spider, is a species of Pholcidae, a family commonly referred to as "cellar spiders" or "daddy long-legs". This species is distributed across the North Pacific region of the United States, as well as in parts of North Africa, Europe, and the Mediterranean.