Ahhh, yep, those are introduced too, but also considered a "ladybug" species. I think they're called multicolored Asian ladybugs. I haven't had a problem with those in over ten years, but these bastards
are the biggest pain in my ass when it comes to my gardens. Japanese beetles.
The ladybug you're talking about was introduced to help combat OTHER introduced bugs (usually from the Hemiptera order, true bugs), which are killing hardwood trees all over the eastern and central US.