I live in NYC and these fellas started popping out near my computer screen and desk. They don't seem interested in food as my sister usually leaves candy wrappers around. They however are stinky, I tried to catch one with a tape and I can smell the odors they give off like 4 inches away. They got these stingers on their butt so I think they could be a species of fire ant. They're also really tiny. As shown on a q tip here.
(click to enlarge)
Finally could these be bites? They are really itchy and I get them overnight.