These little bugs are in my backyard in Austin, Texas. There are about 20 or 30 of them on an outside chair, crawling around very fast. They are very tiny, the picture is really close up. They are easily smushed.
it is probably the nymph of a bordered plant bug in the genus Largus . They are called bordered plant bugs because of the orange margin that the adults have around the outside of their back. Since it is the nymphal stage, the actual species cannot be determined.
The black thorax was too dark to be a spider beetle. As I searched more, it is one of the plant bugs. Bordered plant bugs have sucking mouth parts, sucking plant juices from leaves or stems or seeds of plants. They are known to feed on weeds. Not sure if this one is a pest or not since we do not know what species it is.
These bugs (they are a true bug order Hemiptera, so the name has bug in it.) are found mostly in the southern half of the US.
This insect will not bite.