I'm putting this under T. impressum
for now, based on the general abdominal pattern, size, web type with the typical cup-like retreat formed out of bits of vegetation and remains of prey, and the blue egg sac, all consistent with others of this species I've found in my area. The colors are different on this specimen, though. Compare with the more "usual" specimen I'm used to seeing:
These spiders are interesting in that the young stay with the mother through several molts and often for many weeks after hatching. She lets them eat from prey she captures during this time. The female doesn't live long after the spiderlings hatch, maybe a couple of weeks, and the young remain in her web after she has died. I have found juveniles almost as large as the mother, still in her web, a few weeks after she has died. No evidence yet that they make a meal of her.*
It will be a while before I can verify the species ID on this one by the epigyne. I have to let the babies hatch first so that nature can take its course.
The web was constructed in the dead outer twigs of a raspberry bush, about 2 feet off the ground. She will add to and enlarge her retreat with the remains of future prey, and it will soon be large enough to shelter her upcoming brood. I took the picture from underneath the spider, looking straight up.
[* - After posting these remarks, a female I had in the lab was eaten by her spiderlings. They'd been in her web for a few weeks, and sharing her food. Then, one day they basically swarmed over her, and though she struggled they were overwhelming and she soon died and was eaten. The spiderlings had been fed regularly before they did this, so why they suddenly turned on their mother is a mystery. Of the maternal webs I've found in the wild, and visited regularly over a period of several weeks in each case, the young usually molted through several instars while the mother was still alive, but I noticed no hostility from one to the other.]