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The female ichneumonoid finds a host and lays an egg on, near, or inside the host's body. [9] The ovipositor of ichneumonoids generally cannot deliver a sting as many wasps or bees do. It can be used to bore wood and lay eggs on hosts deep inside, or reach hosts hidden inside leaf shelters.
The Ichneumonidae, also known as ichneumon wasps, ichneumonid wasps, ichneumonids, or Darwin wasps, are a family of parasitoid wasps of the insect order Hymenoptera. They are one of the most diverse groups within the Hymenoptera with roughly 25,000 species described as of 2016 [update] . [ 2 ]
Megarhyssa nortoni is a predatory insect. Its larvae are parasitoids of horntail wasp larvae in coniferous trees. The adult female hunts horntail larvae for egg placement. It smells wood-eating fungus, utilized by the horntail larvae to predigest wood pulp, and uses its antennae to detect vibrations made by the horntail larvae.
Vulgichneumon brevicinctor, female. Ichneumoninae is a worldwide subfamily of the parasitic wasp family Ichneumonidae. Ichneumoninae are koinobiont or idiobiont endoparasitoids of Lepidoptera. It is the second largest subfamily of Ichneumonidae, with 373 genera. Ichneumonines are often large, conspicuous colourful insects.
Female Megarhyssa praecellens in China. Megarhyssa, also known as giant ichneumonid wasps, giant ichneumons, or stump stabbers, [1] is a genus of large ichneumon wasps, with some species known for having the longest ovipositors of any insects. They are idiobiont endoparasitoids of the larvae of wood-boring horntail wasps.
Megarhyssa macrurus, also known as the long-tailed giant ichneumonid wasp [1] or long-tailed giant ichneumon wasp, [2] is a species of large ichneumon wasp. [3] It is a parasitoid, notable for its extremely long ovipositor which it uses to deposit an egg into a tunnel in dead wood bored by its host, the larva of a similarly large species of horntail.
[8] [9] The female has a very short ovipositor that doesn't protrude from the abdomen. [7] Adults can be usually found in summer on flowers, especially Apiaceae species, feeding on nectar and pollen. The adults overwinter. The females of this parasitic wasp lay their eggs into the caterpillars of moths.
Rhyssa persuasoria is one of the largest ichneumon wasps in Europe. The length of adults varies from about 10–20 millimetres (0.39–0.79 in) in males up to 20–40 millimetres (0.79–1.57 in) in the females, plus about 20–40 millimetres (0.79–1.57 in) of the ovipositor.