This guy is born to kill spiders.

The prey spider is transported by the wasp. which holds the prey in its mandibles and walks forwards. The wasp lays eggs into the prey spider’s body. The prey spider is carried into a terminal cell big enough to accommodate both wasp and prey.
The egg is laid on the upper forward part the prey's abdomen. The spider in the cell recovers from paralysis some time between 3 and 6 hours after being stung . After three days, the small larva emerges from the egg and begins to consume the trapped spider, killing it by consuming its abdomen.