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Photo#214496
grey and black jumping spider in egg sac - Platycryptus californicus - female

grey and black jumping spider in egg sac - Platycryptus californicus - Female
Thompson Falls, Sanders County, Montana, USA
August 13, 2008
probably another californicus?

Images of this individual: tag all
grey and black jumping spider in egg sac - Platycryptus californicus - female grey and black jumping spider in egg sac - Platycryptus californicus - female

Moved
Moved from Platycryptus.

Yes to both
That's californicus, and yes she's resting on either a sac of eggs or a sac of spiderlings.

All the adult female jumpers I've found build these two-celled retreats just as you've shown here. One thickly padded and sealed all around to hold her eggs, and the other just a thin cover-up typical of her previous constructions. It's often hard to tell, but usually the thin cover-up has an opening on one or both ends which allows her to escape in a hurry if necessary.

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