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(invertebrate zoology)
The ichneumon flies, a large family of cosmopolitan, parasitic wasps in the superfamily Ichneumonoidea.



a family of parasitic insects of the order Hymenoptera. Body length, 0.4—5 cm; the abdomen and thorax have movable segments. Most species have well-developed wings; the females have an ovipositor, which protrudes outward and is quite long in some species.

Approximately 1, 250 genera (more than 60, 000 species) of ichneumon flies are found throughout the world. Representatives of about 400 genera are encountered in the USSR. The female seeks an animal host and deposits its eggs either on or in the host’s body. The larvae develop as internal or external parasites of the larvae or pupae of other insects or, less commonly, of spiders. By the completion of their development, the larvae have completely destroyed the internal organs of the host. Among the Ichneumonidae are a few hyperparasites, which parasitize the parasites of other insects. Adults feed primarily on flower nectar. The majority are active during the day; some species fly at night and are attracted to light.

Ichneumon flies play an important role in limiting the insect population and are used in the biological control of harmful insects. Sometimes the Russian common name for the Ichneumonidae, naezdniki, is used to designate representatives of other groups of parasitic Hymenoptera, such as the braconids, proctotrupids, and chalcids.


Suitmen, Kh. Biologicheskii metod bor’by s vrednymi nasekomymi i sornymi rasteniiami. Moscow, 1964.


References in periodicals archive ?
Localities Natural enemies Cuauhtemoc Cusihuiriachi Bachiniva Parasitoids not emerged (a) 62 25 27 Hymenoptera Braconidae Chelonus insularis 8 1 5 Meteorus arizonensis 54 67 34 Ichneumonidae Campoletis sonorensis 2 2 0 Campoletis flavicincta 39 7 18 Pristomerus sp.
Ichneumons in Reunion Island: a catalogue of the local Ichneumonidae (Hymenoptera) species, including 15 new taxa and a key to species.
47 Family: Ichneumonidae Exeristes roborator (Fabricius) 0 0.
ichneumonidae larva Epicoronimyia mundelli (blanchard) tachinidae larva unidentified ichneumonidae larva unidentified braconidae larva Trichogramma sp.
Ichneumonidae are not included because the small number of plants with significant captures did not lend themselves to rank relationships.
Families of Collected at Collected at Number of Hymenoptera Hacienda Kiuic Specimens Collected Tabi Research Collected Station Scoliidae [check] 1 Xiphydriidae [check] 1 Formicidae [check] [check] 30 Vespidae [check] [check] 20 Apidae [check] [check] 27 Ichneumonidae [check] [check] 31 Sphecidae [check] [check] 24 Dryinidae [check] [check] 4 Pompilidae [check] [check] 4 Bradynobaenidae [check] [check] 3 Tiphiidae [check] [check] 6 Halictidae [check] [check] 9 Eucollidae [check] [check] 4 Bethyliidae [check] [check] 3 Ormyridae [check] [check] 2 Mutillidae [check] [check] 6 Braconidae [check] 7 Colletidae [check] 2 Scelionidae [check] 2 Chalcididae [check] 2 Torymidae [check] 1 Diapriidae [check] 1 Eucharitidae [check] 3 Evaniidae [check] 1 Andrenidae [check] 1 Sapygidae [check] 1
These families include Ichneumonidae (Arthur & Wylie 1959), Pteromalidae (Assem 1971), Braconidae (Tillman & Cate 1993), Aphelinidae (Opp & Luck 1986) and Eulophidae (Corrigan & Lashomb 1990); in addition to the Trichogrammatidae demonstrated by Salt (1940).
Dasch pursued research on the systematics and ecology of parasitic wasps of the family Ichneumonidae and became an expert in this work.
I cannot persuade myself that a beneficent & omnipotent God would have designedly created the Ichneumonidae with the express intention of their feeding within the living bodies of caterpillars, or that a cat should play with mice.
Ichneumonidae (Hymenoptera) parasitoids of Lepidoptera caterpillars feeding on Croton floribundus Spreng (Euphorbiaceae).