What kind of spider is black with yellow on its belly and legs?
I see those commonly around where I live. I can’t tell you for certain without a picture but I can tell you the most common black spider with yellow on its back and legs (sometimes different patterns) is the Banana Spider. As far as I know I believe it IS poisonous. If you see one then either leave it alone, or kill it from a distance. (I’d prefer something hard like a shovel. I wouldn’t even attempt a spider spray because it’s likely not to work because of it’s size and if it DID work you would PROBABLY be using ALOT of it. Be easier and cheaper just to pulverize it from a distance.