Bug Bothers

I am trying to figure out what this particular creature is. There was a group of about 10 or so on a grape leaf in the yard. They do not fly, swarm or even move particularly quickly. When in confinement, they do not look for a way out, they become really still, but once out, they tend to wander around aimlessly. They act a bit like ladybug beetles, but are a little bigger and have a more armored shell. They have 6 legs, 2 antennae, and 2 visible eyes. The body is black, but the thorax “panel”(?) is red with three large black markings and several smaller black markings around the edge at the midpoint. The underside is bright red.