Geometry Bugs?

Now what kind of bug do you suppose makes these perfectly spaced holes in my petunias?
Again proof that there is order in the universe!
Whatever it is, it is in both of the beds of New Wave Petunias in this part of the garden, but not in the petunias in the other part of my garden.

I'm calling it a geometry bug.

Alas, I have doused the petunias with insecticidal soap, so the geometry bug will be no more.