I don't know, but it looks a bit like a Plumbago or Zebra Blue (Leptotes plinius) to me.
...and if it is...you'll have some gorgeous blue butterflies eventually!

I'm sure someone will come on and ID it for you, or you could always post it at the GW link below.

Let us know what you discover, please!

Here is a link that might be useful: GW insects

Looks to me like it might be a spiny oak-slug caterpillar (Euclea delphinii). If so, don't touch!

Isnt that some form of a mealybug? Looks that way to me anyways.

Here is a link that might be useful: mealybug pic and info

Tony, it does have a look like a green mealy bug, but it looks about 10 times larger to me. How big was this bug, Karalynn? It does look SIMILAR to the oak slugs, but I didn't see any that were exactly like this one. And it looks like it IS caterpilar sized in your photo.

Marcia (wondering what it is, too)

It was about half an inch long and didn't move at all when I picked up the leaf, not even when I poked it with a stick. I tried to see what kind of legs it had but I see any at all. But it didn't have any spines like the oak slugs in the pictures I found.

I would love to have it turn out to be a plumbago or zebra blue!

Hmmmmm...if it didn't move at all, even after poking, it makes me think it might be something other than a caterpillar. Perhaps it really IS a big green mealybug!
*scratching head, and wondering*

Marcia

karalynn, is there a nuclear plant in your neighborhood?
If that is a mealy bug then your yard needs to be quarantine.
Can you imagine an infestation of this boogarts?
Felix

I e-mailed What A Bug to see if they could id this thing. They said it's a Slug Moth Caterpillar without a common name, (Isa textula). And they confirmed that it does sting. So, Marcia, you had the best guess!

Thank you

Keep in in a container and see what it does.
It is so interesting to find out.
Kat

I think its pretty.

It looks like Mary the mealybug! Call her by name and see if she answers your call. I've not seen her in years. Wonder how the family is?