Lacewing eggs. They are beneficial, in that they will eat aphids and thrips, so there is no need to "control" them. They are such voracious feeders that, were the eggs not up on stalks, they'd make their first meal of their brothers and sisters. The stalks tend to fool the first to hatch, increasing the likelihood that several will survive.

By all means let them hatch. They are great at controlling unwanted bugs. I use lacewings, ladybugs and praying mantises in my garden for insect control.
Karyn