I think this is a juvenile group didn't get a pic of the adult it was about 3/4" long and highly agitated (getting sprayed with malthion will tend to do that) they were on a Cleome and Zinnia and already causing a lot of damage
Strange bug
Image #2
It looks like a Harlequin bug, check this out
http://www.entnemdept.ufl.edu/creatures/veg/leaf/harlequin_bug.HTM
Josephine.