Unidentified Eggies!

I was looking for Monarch Butterfly eggs on Milkweed leaves and though I'm certain these aren't Monarchs (They don't have the wonderful textured shape of a Monarch egg), they are really cool! In fact, I found hundreds on several stems nearby and snipped off a piece of the stem! It's now sitting in a container so I can find out what hatches!!! I'm going to make a guess that it's a beetle because there were a few in the area but I really have no idea!