Hi there, I know you posted this a while ago so you may have since identified these. I hope so since you said you have hundreds!! Depending on where you live, there is a possibility that this could be a hobo which is extremely venomous. From what i've read, the hobo cannot be correctly identified without magnification since there are so many spiders with almost identical markings. There are ways to rule a hobo out without a magnifying glass though. I strongly suggest you look into it further because the hobo (if that is what this is) has a bite almost identical to the brown recluse. Good Luck!
