How 'bout the Tarantula Hawk? Those things scare the bejesus outta me!!! First time I saw one was when we were still in TX, dragging a tarantula across the back yard (pic at the bottom). Much to my dismay, we have them here in KS. Evil, vile creatures!
From desertusa.com:
Tarantula hawk stings are considered to be the most painful of any North American insect. Christopher Starr wrote an article entitled, "A Pain Scale for Bee, Wasp and Ant Stings." On a scale of one to four, Pepsis formosa was one of only two insects to rate a four. This compares with a one for a Solenopsis xyloni (desert fire ant), two for a Apis mellifera (honey bee) and three for a Dasymutilla klugii (velvet ant).
One researcher described the tarantula hawk's sting this way: "To me, the pain is like an electric wand that hits you, inducing an immediate, excruciating pain that simply shuts down one's ability to do anything, except, perhaps, scream. Mental discipline simply does not work in these situations. The pain for me lasted only about three minutes, during which time the sting area was insensitive to touch, i.e., a pencil point poked near the sting resulted only in a dull deep pressure pain."
Tarantula wasps are unusual in the severity of their stings. Generally, it is the more social insects that deliver the most painful stings because they have a large nest to defend. Researchers hypothesize that the Pepsis as well as the Dasymutilla have evolved such painful stings because they spend so much time out in the open, exposed to potential predators.
Although painful, the Pepsis sting is not especially lethal. It rates a 38 on a lethal capacity scale. This compares with 5.9 for a Dasymutilla klugii, 54 for a Apis mellifera, and 200 for a Pogonomyrmex maricopa (a desert-dwelling seed-harvester ant).
Read more: https://www.desertusa.com/insects/tarantula-hawks.html#ixzz5zDaHHTju