depscribe's photos with the keyword: 200mm AI-s Micro-Nikkor

The nymph of the froghopper, in this case probably Prosapia bicincta , draws sap from the host plant, here a Queen Anne's lace, and exudes a bubbly, foul-tasting mass which keeps it hydrated and insulated and protects it from predators. It lives inside the "spittle" and dines on the plant. At this stage, the nymphs are called "spittle bugs." In some places, almost every plant has one or more of these foamy installations.

There were several bugs expressing interest -- the little elongated beetle that I've seen on no other plant, small, fat bees, and this ant. I hope the fertilization is effective. Whether the ant plays that role is unknown to me.