They're bite-sized and terrified of us, and they keep the mosquito population from obliterating mankind. In return, we rank them somewhere between bears and serial killers on the list of things you don't want to see in your home. We're speaking, of course, about spiders.

That's not to say we're overly sympathetic, though. After all, if spiders didn't want us to be terrified of them, they wouldn't run around looking so damn terrifying. Here are six terrifying spiders that will haunt your dreams ...