My rudbecia has sucker marks on every leaf. Similar to four line plant bug marks that I have on my spearmint every year. However, the plant is covered with tiny black beetles the same shape as a ground beetle, but miniature. They fly if really provoked. They move really fast, but there are hundreds. I shook them off into a jar easily, as there are so many, but don't have the means to photograph such a small thing. Is it the beetle doing the damage? They are all I can find on the plant. The mums and shasta daisy in the same bed aren't affected.