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The eggs are deposited by the females 5–6 days after copulation. After laying the eggs, females will bind them into a ball with tiny amounts of silk. They then clutch the resulting egg sacs with their mouthparts and carry them around (a behavior common among all cellar spiders). Eggs that somehow fall from the loose bundles do not hatch.
When the eggs are nearly ready to hatch the mother builds a nursery web within which the egg sac is then hung. After they hatch, and until their first molt, the infant spiders inhabit the rather large volume enclosed by this nursery web. The mother spider stations herself nearby to defend the nursery. [4]
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. [ 1 ]
Around 10–14 days after mating occurs, female spiders produce egg sacs which they then transport within their mouths. Egg production can happen anytime between June and September and occasionally, but not often, in April. [4] Before hatching, the female builds a "nursery web" over vegetation and guards it. [15]
Kauaʻi cave wolf spiders only produce 15-30 eggs per clutch, whereas other terrestrial wolf spiders may have 100 to 300. Female Kauaʻi cave wolf spiders carry their egg sacs on their backs until their spiderlings hatch in 30 to 50 days. Upon hatching, the large spiderlings will be carried on the back of the mother for several days.
They are wingless, on average 3 millimeters long, and found in open, grassy habitats. A female's parasitoid will deposit one or several eggs into an E. atra egg sac wall. A larva will hatch that eats the spider eggs and after on average two week, a single adult parasitoid emerges from the egg sac.
The male spider is much smaller than the female, [7] and unassumingly marked. When it is time to mate, the male spins a companion web alongside the female's. After mating, the female lays her eggs, placing her egg sac into the web. The sac contains between 400 and 1400 eggs.
A well-fed female can lay three or more egg sacs each year. Each egg sac typically contains between 40-100 eggs. The mother can often be observed watching her eggs for hours, even days, at a time once the eggs start changing color and grow close to hatching. At normal household temp/humidity, an egg will usually hatch within a month of being laid.