that is a good bug and it eats bad bugs
looks like it is eating some larvae , maybe aphids
ASSASSIN BUGS: GOOD OR BAD?
We say Good!
As we are out and about applying organic fertilizers to our client’s landscapes, we keep an eye out for insects that might be harmful to plants and lawns. But we also keep an eye out for many beneficial insects. Good bugs in the landscape means that your garden is healthy and balanced. Insects such as ladybugs, praying mantis and assassin bugs devour the bad bugs that might otherwise take over your plants, causing them to weaken and become more susceptible to other harmful insects and even disease.
Recently, we’ve been seeing assassin bugs in landscapes. These creepy looking bugs actually eat bad bugs in your garden! They find caterpillar eggs, larvae, and aphids very delicious. If you see these guys around, best to leave them alone. While they are generally harmless to humans, they can deliver a painful bite if they feel threatened. Otherwise, they'll typically just go about their business of defending your landscape from less than desirable critters.