The Pepsinae are a subfamily of the spider wasp family, Pompilidae, including the two genera of large tarantula hawks, as well as many genera of smaller species.
Biology
A female spider wasp generally captures and stings a spider to paralise it; this is for their larvae to feed on. However, the wasps of this subfamily display a range of nesting behaviours:
using preexisting cavities;
using the immobilised spider's burrow;
digging a burrow in soil;
building nests of mud;
parasitoids; and
kleptoparasites.
Taxonomy
Pepsinae can be defined by:
sternite 2 with a distinct transverse groove;
mesofemur and metafemur without subapical spine-like setae set in grooves or pits;
the metatibia with apical spine-like setae of uniform length, the setae not splayed; and
vein Cu1 of fore wing is simple at its base, without any definite downward deflection, i.e. the second discal cell (2D) is without a ‘pocket’.
The subfamily Pepsinae comprises 84 genera. These include 16 genera of Ageniellini, 7 genera of Deuterageniini, 48 genera of Pepsini, 11 genera of Priocnemini, 1 genus of Psoropempulini, and 1 genus unplaced to tribe.
12Waichert, C., Rodriguez, J., Wasbauer, M. S., Von Dohlen, C. D., & Pitts, J. P. (2015). Molecular phylogeny and systematics of spider wasps (Hymenoptera: Pompilidae): redefining subfamily boundaries and the origin of the family. Zoological Journal of the Linnean Society, 175(2), 271-287.
↑Brothers, D. J. & Finnamore. (1993). Superfamily Vespoidea. In Goulet, H. & Huber, J. T. (Eds.). (1993). Hymenoptera of the world: an identification guide to families. 161-278. https://www.researchgate.net/publication/259227143
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Fernández, Fernando; Rodriguez, Juanita; Waichert, Cecilia; Decker, Brenna; Pitts, James (2022). "Twenty two years later: An updated checklist of Neotropical spider wasps (Hymenoptera: Pompilidae)". Zootaxa. 5116 (4): 451–503. doi:10.11646/zootaxa.5116.4.1.
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Loktionov, Valery M.; Lelej, Arkady S. (2018). "Discovery of the spider wasp genus Sphictostethus Kohl, 1884 (Hymenoptera: Pompilidae: Pepsinae) in New Guinea, with description of two new species". Zootaxa. 4429 (2): 295–302. doi:10.11646/zootaxa.4429.2.5.
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Loktionov, Valery M.; Lelej, Arkady S.; Liu, Jing-Xian (2019). "A new genus of spider wasps (Hymenoptera, Pompilidae) from China". Far Eastern Entomologist (376): 1–14. doi:10.25221/fee.376.1.
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Evans, Howard E. (1974). "A review of Psoropempula, a new genus of Australian Pompilidae (Hymenoptera)". Transactions of the Royal Entomological Society of London. 126 (3): 261–278. doi:10.1111/j.1365-2311.1974.tb00854.x.
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Shimizu, Akira; Wahis, Raymond; Harris, Anthony C.; Pitts, James P. (2016). "An extraordinary new genus and species of spider wasps (Insecta: Hymenoptera: Pompilidae) from Southeast Asia". Journal of Natural History. 50 (25–26): 1549–1559. doi:10.1080/00222933.2016.1155781.