This is undoubtedly the Eggplant Flea Beetle, easily eliminated by applying a ring of diatomaceous earth (DE) around the base of each plant. The beetles drop off at night, and when they approach the plant the next day, the DE tears their bodies and they quickly dehydrate. But...some people believe that DE also kills bees. Pyrethrum spray, made from a certain flower, does NOT kill bees (used as directed), and also is effective against flea beetles.