Ichneumonidae
Guides
Trathala extensor
Trathala extensor is a species of ichneumonid wasp described by Dasch in 1979. The genus Trathala belongs to the family Ichneumonidae, one of the largest families of wasps. Specimens of related Trathala species are held in the University of California Riverside Entomology Research Museum. The species name 'extensor' likely refers to anatomical features associated with leg extension, a trait common in the context of jumping and grasping mechanisms studied in related insects.
Trichomma maceratum
Trichomma maceratum is a species of parasitoid wasp in the family Ichneumonidae, first described by Cresson in 1879. The genus Trichomma belongs to the ichneumonid subfamily Pimplinae, a group characterized by ectoparasitic larvae that develop on hosts concealed in plant material or soil. This species has been recorded in western and central Canada, with observations spanning prairie and agricultural habitats. Very little is known about its biology, host associations, or ecological role.
Trieces
Trieces is a genus of parasitoid wasps in the family Ichneumonidae, subfamily Metopiinae. It is one of the largest genera within the Metopiinae, with species described from all zoogeographical regions except the Indomalayan region until recently. Species are solitary endoparasitoids of Lepidoptera. The genus includes multiple species groups, with the onitis group being particularly well-studied in the Nearctic region.
Trogomorpha trogiformis
Trogomorpha trogiformis is a species of ichneumon wasp in the family Ichneumonidae, first described by Cresson in 1864. The genus Trogomorpha is characterized by distinctive morphological features including a compact body form and reduced wing venation. As a member of the subfamily Trogomorphinae (or related group within Ichneumonidae), this species represents a lineage of parasitoid wasps. The specific epithet 'trogiformis' refers to its resemblance to beetles of the family Trogidae (hide beetles), an example of mimicry or convergent body form.
Trogus edwardsii
Trogus edwardsii is a species of ichneumon wasp in the family Ichneumonidae, described by Cresson in 1877. Members of the genus Trogus are parasitoid wasps that attack butterfly and moth larvae. The species is part of a hyperdiverse family containing thousands of species, most of which are poorly known biologically. Like other ichneumonids, T. edwardsii likely plays a role in regulating lepidopteran populations, though specific host associations and detailed biology remain undocumented in available sources.
Trogus flavipennis
Trogus flavipennis is a species of ichneumon wasp described by Ezra Townsend Cresson in 1864. It belongs to the large family Ichneumonidae, one of the most diverse families within Hymenoptera. The genus Trogus comprises parasitoid wasps that attack lepidopteran hosts. The specific epithet "flavipennis" refers to yellowish wing coloration. Available records for this species are sparse, with limited observational data documented in biodiversity databases.
Trogus lapidator
Trogus lapidator is an ichneumonid parasitoid wasp that develops within the pupae of the Old World swallowtail butterfly Papilio machaon. It is notable for an unusual emergence mechanism: rather than cutting through the host pupal case with mandibles like most related wasps, it primarily uses a liquid secretion to soften and dissolve host tissue, employing mandibles only secondarily to spread the secretion and minimally enlarge the exit hole at the end of emergence. The species occurs across Europe, with records from Finland to Belgium and Canada.
Trogus pennator
Trogus pennator is a parasitoid wasp in the family Ichneumonidae that attacks larvae of swallowtail butterflies (Papilionidae), particularly in the genera Eurytides and Papilio. Females locate hosts using chemical cues from larval frass and feeding damage. The species is deterred from parasitizing Battus philenor due to aristolochic acid sequestration by that host. It has been recorded in North America including Vermont.
Tromatobia notator
Tromatobia notator is a species of ichneumon wasp in the family Ichneumonidae. It belongs to the genus Tromatobia, which comprises parasitoid wasps that attack spider egg sacs. The species was first described by Fabricius in 1804. Limited observational records exist for this species, with only one documented observation on iNaturalist.
Trychosis sulcata
Trychosis sulcata is a species of ichneumon wasp in the family Ichneumonidae, described by Townes in 1962. The genus Trychosis belongs to the subfamily Cryptinae, a diverse group of koinobiont endoparasitoids that attack concealed larvae of Lepidoptera and other insects. Very few observations of this species exist in public databases, with only three records documented on iNaturalist as of the source date. The specific epithet 'sulcata' refers to grooved or furrowed sculpturing, likely describing some aspect of the species' morphology.
Tryphonini
Tryphonini is a tribe of koinobiont ichneumonid wasps within the subfamily Tryphoninae. Members are ectoparasitoids of sawfly larvae (Hymenoptera: Symphyta), with females possessing relatively large egg loads compared to idiobiont relatives. The genus Polyblastus is a well-documented member of this tribe. Females have been observed carrying egg clusters externally, possibly due to egg retention after unsuccessful oviposition attempts.
Venturia canescens
Venturia canescens is a solitary koinobiont endoparasitoid wasp in the family Ichneumonidae. The species exhibits both sexual and asexual (parthenogenetic) populations, with the asexual strain being highly synovigenic—continuing egg maturation throughout adult life. Females inject virus-like particles (VLPs) derived from an integrated nudivirus into host larvae during oviposition; these VLPs suppress the host immune system and prevent encapsulation of the parasitoid egg. The species is a significant biological control agent of stored-product pests, particularly pyralid moth larvae.
Virgichneumon zebratus
Virgichneumon zebratus is a species of ichneumon wasp in the family Ichneumonidae, described by Cresson in 1867. The specific epithet 'zebratus' refers to a zebra-striped or banded appearance. As a member of the subfamily Ichneumoninae (tribe Ichneumonini), it is presumed to be a parasitoid of Lepidoptera larvae, though specific host records remain undocumented. The genus Virgichneumon is characterized by distinctive morphological features in the propodeum and areolet wing cell structure.
Vulgichneumon
Vulgichneumon is a genus of ichneumon wasps established by Heinrich in 1961. The genus contains at least 30 described species. Members are parasitoid wasps in the family Ichneumonidae, one of the largest families of Hymenoptera. These wasps are characterized by their slender bodies, long antennae, and elongated ovipositors typical of the family.
Vulgichneumon terminalis
Vulgichneumon terminalis is a species of ichneumon wasp in the family Ichneumonidae, first described by Cresson in 1864. The genus Vulgichneumon comprises medium to large-sized ichneumonid wasps with characteristic color patterns. As a member of the Ichneumonidae, this species is a parasitoid wasp, though specific biological details remain poorly documented. The species is known from a limited number of observations and specimen records.
Xiphosomella dubia
Xiphosomella dubia is a species of parasitoid wasp in the family Ichneumonidae, originally described by Brues in 1911. As a member of the Ichneumonidae, it is presumed to be a parasitoid of other insects, though specific host relationships remain undocumented in the provided sources. The genus Xiphosomella belongs to the superfamily Ichneumonoidea, one of the largest and most diverse groups of parasitoid wasps.
Xorides albopictus
Xorides albopictus is a species of ichneumon wasp in the family Ichneumonidae, first described by Cresson in 1870. It belongs to the genus Xorides, which comprises parasitoid wasps that attack wood-boring beetles. The specific epithet 'albopictus' (Latin for 'white-painted') likely refers to distinctive pale markings on the body. As with other members of its genus, this species is presumed to be a parasitoid of cerambycid or buprestid beetle larvae, though specific host records for X. albopictus appear limited in published literature.
Xoridinae
Xoridine wasps
Xoridinae is a worldwide subfamily of Ichneumonidae containing approximately 220 described species in four genera: Xorides, Odontocolon, Ischnoceros, and Aplomerus. These wasps are idiobiont ectoparasitoids that specialize on wood-boring beetle larvae, particularly Cerambycidae and Buprestidae, and occasionally Hymenoptera (Symphyta). They are strongly associated with mature forest habitats and are considered important biological control agents of forest pests.