Wasp
The largest social wasp is the Asian giant hornet, at up to in length. The various tarantula hawk wasps are of a similar size and can overpower a spider many times its own weight, and move it to its burrow, with a sting that is excruciatingly painful to humans. The solitary giant scoliid, "Megascolia procer", with a wingspan of 11.5 cm, has subspecies in Sumatra and Java; it is a parasitoid of the Atlas beetle "Chalcosoma atlas". The female giant ichneumon wasp "Megarhyssa macrurus" is long including its very long but slender ovipositor which is used for boring into wood and inserting eggs. The smallest wasps are solitary chalcid wasps in the family Mymaridae, including the world's smallest known insect, "Dicopomorpha echmepterygis" (139 micrometres long) and "Kikiki huna" with a body length of only 158 micrometres, the smallest known flying insect.
Phormictopus cancerides
Their most dangerous predator is the pepsis wasp, commonly called the tarantula hawk. Locally it is known as a "matacacata" (the tarantula-killer). This is a very large parasitoid wasp, with an iridescent blue-green body and orange-red wings that grows to about 2 inches or more in length. It captures the spider in its burrow or sometimes in the open and stings it to paralyze it and then lays its eggs on the abdomen. The wasp will drag its victim to a safe place to incubate its young. Once the larvae hatch they will feed on the alive but paralyzed tarantula until it dies.