These are two-spot assassin bugs, also called white-eyed assassin bugs. They are named for their white spots on their backs. I like the name two-spot better, because they don’t really have white eyes. They come from Africa. In this picture, you can see some house crickets at the bottom of the cage, which is their food. They suck the juices out of the crickets. The zookeeper comes by once a day to pull out the old dried cricket parts and put in fresh crickets.
We took this picture last week at the Milwaukee Public Museum.