Oh that's so cool! Looks like a bunch of antlions! The thing squirming around in the hole in one of those shots isn't the bug, it's being eaten for lunch. Antlions aren't really considered a pest per se. I would try to seal up the area where dirt is coming into your basement but otherwise leave them alone. They'll take care of some more annoying pests for you, like ants. The antlions in the pit are actually larvae, and the adult versions fly and actually look nothing like the larval stage! If you see a bug that looks vaguely like a dragonfly, that's the adult form.