Hi Merfee! Welcome to the forum
Your hostas could be getting eaten by slugs, which is the 'popular' hosta bug enemy. There are lots of different things you can do that you'll find by doing a search of the forums, but a few that I can think of offhand are
-set out a shallow dish of stale beer. The slugs will flock to it and drown.
-put some crushed eggshells around your hostas. Slugs won't cross it or will cut themselves crossing it. Some people have luck with this method, but others' don't...guess it depends on whether or not your slugs are real troopers or not
To see if they're slugs munching on your hostas, go out at night with a flashlight and have a look around - that's when you'll find them
Hope that helps!