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.
Polistes carnifex
Polistes carnifex, also known as the executioner wasp, is a neotropical vespid wasp in the cosmopolitan genus "Polistes" and has been noted as having the most painful sting out of all discovered insect species. The wasp is native to Central and South America. It is a very large yellow and brown paper wasp that establishes small colonies which build nests under the eaves of buildings or suspended from branches. The colonies are often founded by solitary queens, many times in the form of winter aggregations to wait until environmental conditions are more suitable for building a colony. Not all nests have a female with developed ovaries. Foraging adults bring nectar and caterpillars back to the nest to feed to the developing larvae which are individually housed in separate cells in the nest. adaptations include mandibles and teeth. Worker-queen conflict, worker policing, and dominance interactions all come into play for the species. and has not been observed to be parasitized. These species tend to live from 6 months to 18 months, making it the longest-living wasp known to date.