I've been noticing a few of these beetles in the garden. I wasn't sure what it was, but with a little research, I found it! With quite a few beetles, the young do not resemble the adult counterparts.
The first pic is the beetle in question. It turned out to be a 4th instar (developmental stage) of a green stink bug. The other pics are the stages that lady beetles go through.
4th instar Green Stink Bug
Hard to believe this will one day be a Lady Bug!
Looking a little more like a Lady Bug
Lady Bug (Lady Beetle)