Where do the bugs go during the day?

At night I have these tiny, mosquito-like insects in my apartment. They’re obviously attracted to the light, they’re bright green, and small. I say mosquito-like cause they make that insanely irritating high-pitched noise, but they don’t bite. And all mosquitos bite me.
In the morning they’re gone, but at night they’re always chilling in the corners of my ceiling. Where do they go during the day?