itsy bitsy spider

Though my family will be surprised to hear this, as I usually completely freak out at the sight of a bug, when it comes to spiders, at least smallish ones, I leave them alone, as long as they stay in their corner. I figure they will do no harm, and eat other bugs.
"Okay Mr. Spider" I say, " As long as you stay in your corner there and don't crawl above or in my bed, shower, or toilet, we'll get along just fine".
So that was my attitude until eating dinner tonight, when I killed about 10 itsy bitsy baby spiders crawling along the kitchen wall. One or two spiders is one thing, but I can't have my aparment turning into the Arachnophobia movie set!
Unfortunately I don't know where the progenitor is, but next time I see him, or her I guess, it's war!