i added some garden soil to my raised beds and now they are crawling with these tiny black beetles that have yellow irregular pattern on their back. not spots or stripes or zigzags. they’re small enough to walk around on your pinky nail. so far my plants dont show any damage but the beetles only started arriving days ago. they seem to like burrowing and moving through the soil. i grow several different vegetables from potatoes to lettuce and squash. thank you.