Every summer, for about a month, we have an invasion of tiny bugs in the bathroom. Back when we were having so much trouble with ants, we called in an exterminator, and he said nobody had ever figured out where they came from or what to do about them, but since they were not harmful and had such short lifespans it wasn’t something they obsessed over.
Fair enough.
Two of them could probably fit on the head of a pin. It amazes me that something so small could possess a heart, a brain and some sort of navigation system. We find them on the wall, clustered around the nightlight we keep burning 24/7; they used to shelter under the clock radio before that item went to the Great Recycling Bin in the Sky. Now, they crawl around the counter, seemingly aimless, but when they meet, each one swings to the left to avoid a collision, and if I put something in their way – a pencil perhaps – they turn and go back. Do they have eyes? Antennae? Do they feel vibrations? How do they do this? What mysterious errands do they run, scurrying along? There’s nothing there to eat; even the ants have given up on that.
Very mysterious. And I really must find something to do with my time, other than gawping in amazement at a bunch of BUGS!
thisendoftheswamp 
What in the world are they? Not tiny ants?
They are some sort of beetle. Definitely not ants.
We have a tiny gray beetle near our laundry room window. With beetles I worry about grains etc. so I send some samples to a bug expert at the university. Apparently they just come in through the window and are harmless and not a pest.
I always find bugs amazing.
Oh yes, I have seen these little bugs when I travel and this is why I do not like summer travel as I have to deal with this and sandflies. In Singapore, we do not have seasons – it is hot, hotter or wet and wetter with rain. During the wet months, we will see that someform of fly will suddenly swarm around our light fittings and drop their wings and die. It is a messy sight and so, I will usually turn off all my light at night and leave a light on in the yard where they can swarm to and report to the heavenly realm. I then do my sweeping of their tiny insect bodies.
They really aren’t a great nuisance. Even when they die, they do so neatly, simply fizzling out on the counter. No gasping or fluttering. Every other day we grab the mini-vac and scoop them all up. As I said, I am so intrigued by them they can stay as long as they wish! Now, New Zealand sand flies are an entirely different breed of cat – or bug. They seem to resemble steroid inflamed mosquitoes! Definitely not something I find the least bit interesting!
Check out this article: http://pestcemetery.com/how-to-tell-a-thief-ant-from-a-pharaoh/
Back in Maryland, we had the thief ants in the townhouses. Hated those things almost as much as I now hate stink bugs.