Recently I started seeing these small insects and managed to capture one which is still alive after 5 days. The Iowa State university's Bugguide helped identify it as a parasitic Brachymeria wasp. What does it eat? Is it a threat to the wood in my house? Should I kill or release the trapped bug?
Montgomery County Maryland insect issues
These are beneficial wasps that eat pollen and nectar. They are parasitic to other types of insects. They are not wood-boring insects and will not cause any damage to the wood of your house. It would be best to release them.