I have a thriving colony of steatoda triangulosa in my home, and I actively encourage them since I live in hobo spider country. It never occurred to me to notice until recently, however, that the ones in my house are small (5mm max) and yellow while the ones in my garage are black and white and much bigger (5-8mm).

Coloration and size would seem to indicate s. hespera, but the triangulate pattern strongly indicates s. triangulosa. I presume from this that I simply have two different flavors of s. triangulosa but wanted to ask an expert. I'm just geeky enough to brag to my friends that I have two different steatoda species in my house. :-)