This critter made a spiral web, barely bigger than she was, against the side of the house. The top of the web was anchored to the house, the bottom was anchored to a gigantic, abandoned black widow cobweb. When prey brushed her web, she would begin bouncing her web like a trampoline. The thorax was actually brilliant white, depending on how the light caught it--here it's almost a dull brown.

Overnight she moved her web a foot down, completely across the gigantic, abandoned black widow cobweb. This worked out very well until she caught a lacewing. The vibration of the arriving lacewing caused the owner of the gigantic black widow web to reveal that her web was not, in fact, abandoned! The widow crept across her web and right up into the yellow spider's web before backflipping to start slapping the yellow spider with her hindlegs. I presume this was to slap glue silk to the other spider (hunting behavior I've observed in black widows in the past). The yellow spider leapt from her web and fled the scene.

I'm pretty sure this is an argiope; I'm curious if the species is identifiable.