Bug of the Day - Arachtober!

I thought for sure that an id was out of the question on this cobweb spider, because I only caught a shot of the underside, but it turns out that the shape of the epigyne (external genital structure on females, which is what you probably guessed it was from the name ;-)) is an id character for this species, which Aaron McKee helpfully pointed out is Steatoda borealis.