This lady beetle is a native species, very small (about 5mm), but she dwarfs those eggs! The eggs are laid by the little Neogalerucella beetle, which was introduced as a biocontrol for purple loosestrife. The lady beetle was seemingly eating the eggs, and you can see one is opened. The black lines are feces which the female places on each egg, perhaps to deter predators! In this case it didn't work, and the only reason the lady beetle is moving away is because I'm there taking photos. We need all the Neogalerucella beetles we can get though!

Neogalerucella beetles were, until recently, called Galerucella. This is the species calmariensis.