That looks like what that larvae of potato beetles did to some eggplants of mine, though I didn't have peppers damaged by them. Overnight the leaves were reduced to a netting on their favorite variety, and all were damaged. I thought of that, since you mentioned the presence of potato beetles. Are you also growing potatoes? This was my problem - the number of potato beetles was so high, yet the potatoes were barely bothered, the leaves were so thick! I haven't grown them since, as the other plants don't really attract the huge numbers of bugs. Flea beetles are the problem I have with eggplants, but again, not peppers. But maybe you don't grow eggplants, and the bugs go to the peppers, instead. I spray Surround on my EP, and it works to keep bugs off of peppers, too, but I stop spraying those early on, as it is a pain to get off of small, hot peppers. It wipes off of EPs, and larger peppers easily, however. And to get rid of what is on there now, if it seems they are underneath the leaves still, spray with insecticidal soap, or some neem oil (oils aren't good at over 90º).