Pseudagenia

wasp genus

Written by

The Information Architects of Encyclopaedia Britannica

Last updated

July 13, 2026

Quick Summary

Pseudagenia is a genus of spider wasps belonging to the family Pompilidae. These wasps are known for their parasitoid behavior, meaning they paralyze spiders to feed their young. While they prey on spiders, they are not considered economically destructive.1

Spider wasps, including those in the genus Pseudagenia, are typically large, with some species exceeding 5 cm (2 inches) in length. They are characterized by slender, often dark bodies and smoky or yellowish wings. Many species can run rapidly and possess long, spiny legs. The sting of a spider wasp is known to be very painful.1

Species within the genus Pseudagenia construct mud cells under bark or among stones to house their prey and eggs. The paralyzed spider serves as food for the developing wasp larva.1

Summary created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

5 Britannica Sources

Ask Britannica AI about this topic

Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.

spider wasp
…of the North American genus Pseudagenia construct cells of mud under bark or among stones. Some species construct the nest before capturing the spider; others capture the spider first, then set it aside until the nest is completed. A single spider and a single egg are placed in the nest.…
Read More
…of the North American genus Pseudagenia construct cells of mud under bark or among stones. Some species construct the nest before capturing the spider; others capture the spider first, then set it aside until the nest is completed. A single spider and a single egg are placed in the nest.…
Read More