ants? termites?

I’m pretty sure these are ants, but can someone confirm? I was worried they were termites, but after a google search, it doesn’t seem like it.

I found a bunch of them in my finished basement. They were near the basement door and halfway into the basement. It must have been about 40 of them, which I killed with ant spray. I’ve never seen so many ants at one time inside the house. Why would they come in? And what can I do to prevent them from re-entering? I’ve already sprayed the ant killer around the door area, but I feel this is a very temporary solution when the stuff dissipates. Any suggestions appreciated.

By honeybear |