A while back one of your subscribers asked this question. As far as I can see she never received an answer. I, too, would like to know what is eatting my monarda leaves? What ever it is it is really having a feast and I want it stopped.
No pics! They are little holes, a lot of them. I thought slugs but I've got them covered. I don't see much of anything else in the yard except for bees.
Really tiny holes might be the result of a fungal infection - here we call it Buckshot Mildew. However, I'd be more inclined to suspect beetles.