There is this bug that has been on my zinnias for several weeks now. At first it looked like a big red ant, but with a more "dragon shaped" body (sorry, best way I can describe it). Now it's grown into a much bigger, uglier bug, probably about an inch long. It has a narrow body. I know I should probably take a picture of it. I'll try to. They hang out in groups on top of my zinnia flowers. I don't know if they are eating them or what. Any suggestions as to what this bug might be?