There was a breeding swarm of Goldenrod Soldier beetles, Chauliognathis pennsylvanicus, family Cantharidae that invaded our collection of potted plants this fall. The flower is Chrysanthemum sp. and is an Asian member of the Asteraceae family. These flowers were 1.5 inches in diameter, a small flowered mum. For 3 days, we had these beetles all over our plant collection, they fed on the nectar but did no harm to the plants.