Cuckoo-wasp
Guides
Amisega
Amisega is a genus of cuckoo wasps in the family Chrysididae, subfamily Amiseginae. These small, metallic wasps are known primarily from the Neotropical region and the southwestern United States. The genus was established by Cameron in 1888 and remains relatively poorly studied compared to other chrysidid genera. Members of Amiseginae are distinguished by their reduced wing venation and association with stick insect eggs as hosts.
Amisega kahlii
Amisega kahlii is a species of cuckoo wasp in the subfamily Amiseginae. Members of this genus are kleptoparasitic, laying eggs in the nests of other insects. The species has been recorded from scattered localities across the eastern and central United States.
Amiseginae
Amiseginae is a subfamily of cuckoo wasps (Chrysididae) containing over 30 genera and approximately 150 described species. These wasps are obligate parasitoids of stick insect eggs (Phasmatodea), a highly specialized ecological relationship that has persisted since at least the mid-Cretaceous. Females of some genera are flightless and exhibit ant-like morphology. The subfamily has a global distribution.
Argochrysis
cuckoo wasps
Argochrysis is a genus of cuckoo wasps (family Chrysididae) containing approximately five described species. Members are obligate cleptoparasites of solitary ground-nesting wasps in the genus Ammophila. The genus is notable for sophisticated learned foraging behaviors, including visual host location during nest excavation, spatial memory for nest locations, and surveillance of multiple nests during host absence.
Argochrysis armilla
Argochrysis armilla is a cleptoparasitic wasp in the family Chrysididae that specializes in attacking ground-nesting sphecid wasps of the genus Ammophila, particularly A. dysmica. This species has evolved sophisticated behavioral adaptations to overcome the temporal and spatial defenses of its hosts, including visual location of digging hosts, spatial learning of nest locations, and surveillance of multiple nests during host absence. Its foraging strategy creates strong selective pressure on host nesting behavior, favoring delayed provisioning and dispersed nest placement. The species was described by Bohart in 1982 and remains poorly known from a natural history perspective beyond its host interactions.
Argochrysis inornata
Argochrysis inornata is a species of cuckoo wasp in the family Chrysididae. Members of the genus Argochrysis are kleptoparasites that target ground-nesting bees, particularly in the family Anthophoridae. The specific name "inornata" (Latin for "unadorned" or "plain") suggests relatively simple coloration compared to the metallic brilliance typical of many chrysidids.
Caenochrysis deversor
Caenochrysis deversor is a species of cuckoo wasp in the family Chrysididae. The genus Caenochrysis comprises small, brilliantly metallic wasps that are parasitoids of other insects. Members of this genus are known to parasitize larvae of various hymenopteran hosts, particularly other wasps. The species was documented in the southwestern United States during field observations in ponderosa pine forests.
Caenochrysis doriae
Caenochrysis doriae is a species of cuckoo wasp in the family Chrysididae, first described by Gribodo in 1874. Members of this genus are kleptoparasitic, laying eggs in the nests of other wasps and bees. The species has been documented in the southwestern United States, including Arizona and Utah. Specific biological details for C. doriae remain poorly documented in published literature.
Ceratochrysis
Ceratochrysis is a genus of cuckoo wasps in the family Chrysididae, established by Cooper in 1952. Members are kleptoparasitic wasps known for their metallic coloration and hard, sculptured exoskeletons. The genus is distinguished by antennal characteristics and specific structural features of the mesosoma. Species within this genus target the nests of other wasps and bees, laying eggs in host provisions.
Ceropalinae
cuckoo spider wasps
Ceropalinae is a subfamily of spider wasps (Pompilidae) comprising two genera: Ceropales and Irenangelus. Members are obligate kleptoparasites that exploit the nests of other solitary wasps, primarily fellow pompilids that hunt spiders. Unlike most spider wasps that provision their own nests with paralyzed spiders, ceropalines invade the nests of host wasps to lay their eggs on spiders already captured and stored by the host. This parasitic lifestyle represents a distinct evolutionary strategy within the Pompilidae.
Chrysis angolensis
Chrysis angolensis is a cuckoo wasp in the family Chrysididae. Originally described from Angola, it has established populations across much of the world through human-mediated dispersal. The species is a documented parasite of mud dauber nests, with a known association to the black and yellow mud dauber Sceliphron caementarium. It has been recorded as introduced to French Polynesia and is well-established in North America.
Chrysis antennalis
Chrysis antennalis is a species of cuckoo wasp in the family Chrysididae, described by Rosen & DeBach in 1979. Like other members of the genus Chrysis, this species is a kleptoparasite that lays eggs in the nests of other solitary wasps and bees. The larvae consume the provisions intended for the host's offspring.
Chrysis apontis
Chrysis apontis is a species of cuckoo wasp in the family Chrysididae, described by Bohart in 1982. Cuckoo wasps in the genus Chrysis are kleptoparasitic, laying eggs in the nests of other solitary wasps and bees. The larvae consume the host's provisions and offspring. Members of this genus are known for their metallic coloration and heavily armored exoskeletons.
Chrysis cessata
Chrysis cessata is a species of cuckoo wasp in the family Chrysididae, first described by Buysson in 1891. Like other members of the genus Chrysis, it is a parasitoid that exploits the nests of solitary wasps and bees. Cuckoo wasps are characterized by their brilliant metallic coloration and heavily armored exoskeletons that allow them to resist attacks from host species.
Chrysis coerulans
Cuckoo Wasp
Chrysis coerulans is a species of cuckoo wasp in the family Chrysididae. Like other members of its family, it is a parasitoid that infiltrates the nests of solitary wasps and bees to lay its eggs. The species belongs to the Chrysis coerulans species group, a taxonomically complex assemblage that researchers are still working to fully resolve. These wasps are characterized by their metallic coloration and armored exoskeletons.
Chrysis coloradica
Chrysis coloradica is a species of cuckoo wasp in the family Chrysididae. Like other members of its genus, it is likely a parasitoid that targets the nests of solitary wasps or bees. Cuckoo wasps in this genus are known for their brilliant metallic coloration and armored exoskeletons that protect them from host defenses. The specific epithet "coloradica" suggests a connection to Colorado or the western United States, though precise distribution details for this species are not well-documented in the provided sources.
Chrysis conica
Chrysis conica is a species of cuckoo wasp in the family Chrysididae, first described by Brullé in 1846. Like other members of the genus Chrysis, it is a parasitoid that lays its eggs in the nests of other solitary wasps or bees. The larva consumes the host's provisions and developing offspring. Adults are typically metallic in coloration, a characteristic feature of the family.
Chrysis derivata
Chrysis derivata is a species of cuckoo wasp in the family Chrysididae. Like other members of this genus, it is a parasitoid that targets the nests of solitary wasps and bees. The species exhibits the characteristic metallic coloration typical of Chrysis wasps. Very few observations of this species have been recorded, with only two documented occurrences in iNaturalist, indicating it is either rare, underreported, or restricted in distribution.
Chrysis dorsalis
Chrysis dorsalis is a species of cuckoo wasp in the family Chrysididae. Like other members of this genus, it exhibits the characteristic metallic coloration and parasitic lifestyle typical of the group. Cuckoo wasps in this genus are known for their armored exoskeletons and ability to infiltrate the nests of solitary wasps and bees to lay their eggs. The specific biology and host associations of C. dorsalis remain poorly documented in available sources.
Chrysis inaequidens
Chrysis inaequidens is a species of cuckoo wasp in the family Chrysididae, first described by Dahlbom in 1854. Like other members of its genus, it is a parasitoid that lays eggs in the nests of solitary wasps and bees. The species exhibits the characteristic metallic coloration typical of cuckoo wasps. As with many Chrysis species, detailed biological information is limited due to their secretive lifestyle and the taxonomic challenges of distinguishing closely related species.
Chrysis lucifera
Chrysis lucifera is a species of cuckoo wasp in the family Chrysididae, first described by Bohart in 1982. Like other members of its genus, it is a cleptoparasite that lays eggs in the nests of solitary wasps and bees, where its larvae consume the host's provisioned food. The species exhibits the characteristic brilliant metallic coloration and armored exoskeleton typical of cuckoo wasps. Specific details about its host associations and geographic range remain limited in published literature.
Chrysis montana
Chrysis montana is a species of cuckoo wasp in the family Chrysididae. Cuckoo wasps in this genus are kleptoparasites that lay eggs in the nests of other solitary wasps and bees. The species epithet "montana" suggests an association with mountainous regions, though specific ecological details for this species remain undocumented. Members of Chrysis are recognized by their brilliant metallic coloration and compact, armored bodies.
Chrysis nitidula-complex
The Chrysis nitidula-complex is a species group of cuckoo wasps (family Chrysididae) characterized by metallic coloration and parasitic life history. Members of this complex are kleptoparasites that lay eggs in the nests of other solitary wasps, particularly mason wasps. The larvae consume the prey provisions intended for the host's offspring. Species within this complex are difficult to distinguish morphologically and require detailed examination for definitive identification.
Chrysis parkeri
Chrysis parkeri is a species of cuckoo wasp in the family Chrysididae. Cuckoo wasps are kleptoparasites that lay eggs in the nests of other solitary wasps and bees, with their larvae consuming the host's food stores. Members of the genus Chrysis are known for their striking metallic coloration and heavily armored exoskeletons.
Chrysis pellucidula
Chrysis pellucidula is a species of cuckoo wasp in the family Chrysididae. Like other members of the genus Chrysis, it is a parasitoid that lays eggs in the nests of solitary wasps and bees. The species exhibits the characteristic metallic coloration typical of cuckoo wasps, though specific details of its appearance and biology are not well-documented in available sources.
Chrysis propria
Chrysis propria is a species of cuckoo wasp in the family Chrysididae. Cuckoo wasps are parasitic wasps that lay eggs in the nests of other solitary wasps and bees. Members of the genus Chrysis are known for their striking metallic coloration and armored exoskeletons that provide defense against host attacks.
Chrysis provancheri
Chrysis provancheri is a species of cuckoo wasp in the family Chrysididae. Cuckoo wasps in this genus are known for their metallic coloration and parasitic lifestyle, laying eggs in the nests of other solitary wasps. The species was described by Schulz in 1906. Like other members of Chrysididae, it possesses a heavily armored exoskeleton that provides protection when entering host nests.
Chrysis rivalis
Chrysis rivalis is a species of cuckoo wasp in the family Chrysididae. Like other members of the genus Chrysis, it exhibits bright metallic coloration and a parasitic lifestyle, laying eggs in the nests of solitary wasps or bees. The species belongs to a taxonomically challenging group where color variation and morphological similarity have historically complicated species identification. Cuckoo wasps in this genus possess armored exoskeletons and the ability to curl into a defensive ball to protect against host attacks.
Chrysis scitula
Chrysis scitula is a species of cuckoo wasp in the family Chrysididae. Cuckoo wasps are obligate parasites of other solitary wasps and bees, with females laying eggs in host nests. Members of the genus Chrysis are known for their striking metallic coloration and heavily armored exoskeletons that provide protection during nest invasions. The specific biology and host associations of C. scitula remain poorly documented.
Chrysis tenuicornis
Chrysis tenuicornis is a species of cuckoo wasp in the family Chrysididae. Members of this genus are known for their striking metallic coloration and parasitic lifestyle, laying eggs in the nests of other solitary wasps and bees. The specific epithet "tenuicornis" refers to slender antennae, a characteristic that may aid in species identification within this diverse genus.
Chrysura
cuckoo wasps
Chrysura is a large genus of cuckoo wasps in the family Chrysididae, comprising 117 species described by Dahlbom in 1845. The genus is predominantly Palaearctic in distribution, with 106 of 117 species occurring in this region. Members are kleptoparasites that target megachilid bees, laying eggs in host nests where larvae consume host provisions. The type species is Chrysura austriaca.
Chrysura kyrae
Chrysura kyrae is a parasitoid wasp in the family Chrysididae. It has been documented as a parasitoid of Osmia lignaria subsp. lignaria, a mason bee in the family Megachilidae. The species belongs to a genus of cuckoo wasps known for their metallic coloration and kleptoparasitic or parasitoid lifestyles targeting solitary bees and wasps.
Chrysura pacifica
Chrysura pacifica is a species of cuckoo wasp in the family Chrysididae. Members of this genus are known as cleptoparasites of other bees and wasps, with females laying eggs in the nests of host species. The specific epithet "pacifica" suggests a western North American distribution, though detailed records are sparse. The species has been documented in at least three iNaturalist observations.
Chrysurissa densa
Chrysurissa densa is a species of cuckoo wasp in the family Chrysididae. It is known as a parasite of the nests of pollen wasps in the genus Pseudomasaris, specifically targeting the mud nests of Pseudomasaris vespoides. The species was first described by Cresson in 1865. Like other cuckoo wasps, females lay their eggs in the nests of host wasps, where their larvae consume the pollen and nectar provisions intended for the host's offspring.
Cleptes
cuckoo wasps, jewel wasps
Cleptes is a genus of cuckoo wasps comprising approximately 100 recognized species, making it the largest genus in the subfamily Cleptinae. Members are parasitoids of sawfly prepupae, exhibiting the characteristic brood parasitism of their family. The genus has been relatively well studied in Europe and North America, though Asian faunas remain poorly documented. A 2013 revision from China recognized seventeen species, nine of which were newly described.
Cleptes rufigaster
cuckoo wasp, jewel wasp
Cleptes rufigaster is a species of cuckoo wasp in the family Chrysididae. The genus Cleptes comprises parasitoid wasps known for their metallic coloration and distinctive nesting habits. Members of this genus are parasitoids of sawfly prepupae. The species was described from China as part of a 2013 revision that recognized seventeen Cleptes species from the country, nine of which were new to science.
Cleptes speciosus
Cleptes speciosus is a species of cuckoo wasp in the family Chrysididae, first described from China. The species is one of nine new species discovered during the first systematic revision of the genus Cleptes from China. Members of this genus are parasitoids of sawfly prepupae and exhibit the distinctive metallic coloration and conglobation behavior characteristic of cuckoo wasps.
Cleptinae
Cleptinae is a small subfamily of cuckoo wasps in the family Chrysididae, containing three genera and approximately 100 described species. They are obligate parasitoids of prepupal larvae of tenthredinid sawflies. Members are generally medium-sized, measuring 4–6 mm in length. They may be locally abundant during outbreaks of their host populations, though generally considered rare.
Elampini
Elampini is a tribe of cuckoo wasps within the family Chrysididae, comprising approximately 12 genera including Elampus, Hedychrum, and Holopyga. Members are kleptoparasitic wasps that lay eggs in the nests of other hymenopterans, particularly solitary bees and wasps. The tribe is distinguished by morphological features of the metasoma and male genitalia. Elampini species are found across the Holarctic region with highest diversity in the Palearctic.
Elampus nitidus
Elampus nitidus is a species of cuckoo wasp in the family Chrysididae, a group of parasitoid wasps known for their metallic coloration and kleptoparasitic lifestyle. The species belongs to the genus Elampus, which contains approximately 18 species distributed across North America. Members of this genus are known to parasitize the nests of other solitary wasps, particularly those in the family Crabronidae.
Hedychridium
cuckoo wasps
Hedychridium is a genus of cuckoo wasps in the family Chrysididae, characterized by brilliant metallic coloration in blues, greens, and reds. These small wasps are nest parasites of predatory solitary wasps, with females laying eggs in the nests of host species. The genus is distributed across the Western Palaearctic, with some species found in North America and isolated records from the Far East. Adults are commonly observed visiting flowers for nectar, particularly plants in the families Apiaceae and Asteraceae.
Hedychridium crassum
Hedychridium crassum is a species of cuckoo wasp in the family Chrysididae, a group known for their brilliant metallic coloration and parasitic lifestyle. The genus Hedychridium is among the most vividly colored of all chrysidid wasps, with members displaying bright metallic blues, greens, and reds. Species in this genus are nest parasites of predatory solitary wasps. Very little specific information is available about H. crassum itself, as it appears to be a poorly documented species with no confirmed observations in major biodiversity databases.
Hedychridium dimidiatum
Hedychridium dimidiatum is a species of cuckoo wasp in the family Chrysididae. These small, brilliantly metallic wasps are nest parasites of predatory solitary wasps, particularly beewolves in the genus Philanthus. The species has been documented as a suspected parasite of Philanthus gibbosus in North America. Like other chrysidids, females enter host nests to lay eggs, and when threatened can roll into a tight ball where their dense, sculptured cuticle protects them from stings and bites.
Hedychridium fletcheri
Hedychridium fletcheri is a species of cuckoo wasp in the family Chrysididae. The genus Hedychridium comprises brilliantly colored wasps with metallic blue, green, and red coloration. These wasps are nest parasites of predatory, solitary wasps. The specific epithet "fletcheri" suggests the species was named in honor of an individual with that surname, though the exact etymology is not documented in available sources.
Hedychridium solierellae
Hedychridium solierellae is a species of cuckoo wasp in the family Chrysididae. Members of this genus are among the most brilliantly colored of the chrysidids, exhibiting bright metallic blues, greens, and reds. These wasps are nest parasites of predatory, solitary wasps. The genus Hedychridium is part of the diverse cuckoo wasp family Chrysididae, which comprises kleptoparasitic species that lay their eggs in the nests of other wasps and bees.
Hedychrum
Hedychrum is a large genus of cuckoo wasps in the family Chrysididae, comprising roughly 150 species and ranking as the second largest genus in the family. Most species occur in the Palaearctic region, with additional species present in the Oriental, Afrotropical, Nearctic, and Neotropical regions. These wasps are obligate brood parasites of ground-nesting apoid wasps, primarily in the subfamily Philanthinae.
Hedychrum cupricolle
Hedychrum cupricolle is a species of cuckoo wasp in the family Chrysididae. Like other members of its genus, it is a kleptoparasite that targets the nests of solitary wasps. The species has been recorded in Europe, though specific details about its biology and distribution remain limited in published sources.
Hedychrum parvum
Hedychrum parvum is a species of cuckoo wasp in the family Chrysididae. As with other members of this genus, it is likely a cleptoparasite that lays eggs in the nests of other wasps, particularly digger wasps. The species has been rarely recorded, with only two observations documented on iNaturalist. Its small size and metallic coloration are characteristic of the genus.
Hedychrum violaceum
Hedychrum violaceum is a species of cuckoo wasp in the family Chrysididae. Cuckoo wasps are kleptoparasites, laying their eggs in the nests of other wasp species where their larvae consume the host's provisions. The species exhibits the characteristic metallic coloration typical of the genus Hedychrum. Like other members of its family, it is associated with open, sandy habitats where its hosts nest.
Holopyga horus
Holopyga horus is a species of cuckoo wasp in the family Chrysididae. Like other members of the genus Holopyga, it is a cleptoparasite that exploits the nests of other wasps. Research indicates that females may lay eggs directly into aphids, which are then captured by crabronid wasps such as Pemphredon and carried to their nests. The cuckoo wasp larva emerges before the host larva and consumes the provisions intended for the host offspring. This indirect parasitic strategy has been documented in related Holopyga species and is suspected to occur in H. horus.
Holopyga ventralis
Holopyga ventralis is a species of cuckoo wasp in the family Chrysididae. The genus Holopyga comprises small, brilliantly metallic-colored wasps that are cleptoparasites of other wasps. Based on observations of related species in the genus, H. ventralis likely exhibits the distinctive parasitic behavior of laying eggs into aphids, which are then carried as prey by crabronid wasps into their nests where the Holopyga larva develops at the expense of the host wasp's offspring.
Microchridium
Microchridium is a genus of cuckoo wasps in the family Chrysididae, established by Bohart in 1980. It belongs to the order Hymenoptera, a group that includes wasps, bees, and ants. As with other chrysidids, members of this genus are likely cleptoparasitic, laying eggs in the nests of other wasps or bees. The genus is poorly known, with minimal published information and very few observations documented. Its taxonomic status is marked as doubtful in some databases, indicating potential issues with its validity or circumscription.
Microchridium minutum
Microchridium minutum is a species of cuckoo wasp in the family Chrysididae. It is among the smallest members of the family, with the genus name reflecting its diminutive size. Like other chrysidids, it is presumed to be a parasitoid or kleptoparasite, though specific host associations remain undocumented. The species is known from extremely limited material, with only a single observation recorded in iNaturalist.
Nysson intermedius
Nysson intermedius is a species of cuckoo wasp in the family Crabronidae, subfamily Bembicinae. It was described by Viereck in 1908. Members of the genus Nysson are kleptoparasitic, laying their eggs in the nests of other digger wasps, particularly those in the genus Bembix and related taxa. The species occurs in North America.
Nysson subtilis
Nysson subtilis is a species of solitary wasp in the family Crabronidae, subfamily Bembicinae. It occurs in North America, with records from Canada including Nova Scotia. The species is a cleptoparasite (cuckoo wasp) that targets nests of other ground-nesting crabronid wasps, particularly those in the genus Hoplisoides. It can be distinguished from congeners by its entirely black front.
Nysson tristis
Nysson tristis is a species of solitary wasp in the family Crabronidae (formerly Bembicidae). It is a member of the genus Nysson, which comprises cleptoparasitic wasps that exploit the nests of other digger wasps. The species is known from North America, with records from Canada and the United States. Like other Nysson species, it likely targets the nests of sand wasps (Bembicini) as hosts.
Omalus aeneus
Cuckoo Wasp
Omalus aeneus is a small, metallic cuckoo wasp in the family Chrysididae. Females reach 4.5–5.4 mm in body length, males 4.4–5 mm. The species exhibits striking metallic coloration ranging from blue, green, and purple to nearly black or golden, with greenish-blue abdomen and legs. This cleptoparasitic wasp has two or more generations annually in southern Europe and exploits a remarkable indirect parasitism strategy: females oviposit into living aphids, which are subsequently captured by aphid-hunting crabronid wasps and transported to their nests, where the cuckoo wasp larva develops.
Omalus downeyi
Downey's Cuckoo Wasp
Omalus downeyi is a species of cuckoo wasp in the family Chrysididae. Like other members of the genus Omalus, it is a kleptoparasite that targets the nests of solitary wasps, particularly aphid-hunting wasps in the family Crabronidae such as Pemphredon and Passaloecus. The species exhibits an indirect parasitic strategy: females oviposit into aphids, which are then captured by host wasps and transported to their nests, where the cuckoo wasp larva develops by consuming the host's provisions.
Omalus glomeratus
Omalus glomeratus is a species of cuckoo wasp (family Chrysididae) known for its kleptoparasitic lifestyle. Like other members of the genus Omalus, females oviposit directly into aphids, exploiting the hunting behavior of aphid wasps in the family Crabronidae (such as Pemphredon and Passaloecus). When a crabronid wasp captures and carries the parasitized aphid to its nest, the Omalus larva hatches and consumes the food provisions intended for the host larva. This indirect parasitic strategy avoids the risks of direct nest entry. The species has been observed in Europe and represents part of a broader behavioral pattern documented across Omalus, Pseudomalus, and Holopyga.
Omalus iridescens
Omalus iridescens is a species of cuckoo wasp in the family Chrysididae. Like other members of the genus Omalus, it is a cleptoparasite that exploits the nesting behavior of solitary wasps. The species exhibits the characteristic metallic coloration typical of chrysidid wasps. Based on documented behaviors of closely related Omalus species, females likely oviposit into aphids that are subsequently captured by crabronid wasps and transported to their nests, where the cuckoo wasp larva develops at the expense of the host's offspring.
Omalus variatus
Omalus variatus is a species of cuckoo wasp in the family Chrysididae. Like other members of its genus, it is a kleptoparasite that targets the nests of solitary wasps, particularly aphid-hunting wasps in the family Crabronidae. The species exhibits a distinctive indirect parasitism strategy: females oviposit into aphids, which are then captured by host wasps and transported to their nests, where the cuckoo wasp larva develops by consuming the host's provisions.
Parnopes chrysoprasinus
Parnopes chrysoprasinus is a species of cuckoo wasp in the family Chrysididae. Like other members of this family, it is a parasitoid that lays its eggs in the nests of other solitary wasps. The larvae consume the host's eggs, larvae, and stored food provisions. The genus Parnopes includes species that target sand wasps and other ground-nesting solitary wasps as hosts. Chrysidid wasps are known for their heavily sculptured, brilliantly metallic exoskeletons that serve as armor against host defenses.
Parnopes edwardsii
cuckoo wasp
Parnopes edwardsii is a parasitic cuckoo wasp in the family Chrysididae, native to western North America. The species exhibits metallic blue-green coloration typical of chrysidid wasps. Females are nest parasites of sand wasps, specifically targeting burrows of species in the genus Steniolia and related crabronid wasps.
Parnopes fulvicornis
Parnopes fulvicornis is a species of cuckoo wasp in the family Chrysididae. As a member of the genus Parnopes, it is a parasitoid that lays eggs in the nests of other solitary wasps. The species is known from a limited number of observations, with records primarily from western North America. Like other chrysidid wasps, it likely exhibits the family's characteristic metallic coloration and heavily sculptured exoskeleton.
Philoctetes variatus
Philoctetes variatus is a species of cuckoo wasp in the family Chrysididae, a group known for their kleptoparasitic or parasitoid lifestyle targeting other Hymenoptera. The genus Philoctetes is a small, poorly documented group within Chrysididae. Information about this species is extremely limited, with minimal published research and few verified observations. It is known from a single iNaturalist record, indicating significant data gaps in its biology and distribution.
Pseudomalus
cuckoo wasps, jewel wasps
Pseudomalus is a genus of cuckoo wasps (family Chrysididae), commonly known as jewel wasps for their brilliant metallic coloration. Species in this genus are kleptoparasites that exploit the nests of solitary wasps and bees. A distinctive behavioral trait involves females ovipositing into aphids, which are then captured by crabronid wasps and carried to their nests—indirectly delivering the cuckoo wasp larva to its eventual host. The genus includes both Palearctic natives and at least one introduced species (P. auratus) now established in North America.
Pseudomalus auratus
cuckoo wasp, jewel wasp
Pseudomalus auratus is a small cuckoo wasp in the family Chrysididae, notable for its striking metallic coloration with emerald green head and thorax contrasting with a ruby red abdomen. Native to the Palearctic region, it has been accidentally introduced to North America, likely before 1828. The species exhibits an unusual indirect parasitic strategy: females oviposit into aphids, which are then captured by crabronid wasps and carried to their nests, where the cuckoo wasp larva emerges to kill the host larva and consume the stored provisions.
Sapyga louisi
Louis's Club-horned Cuckoo Wasp, club-horned cuckoo wasp
A small species of club-horned wasp in the family Sapygidae. Adults visit flowers for nectar. The larvae are kleptoparasites that develop by consuming the provisions and host larvae of leaf-cutter bees, including Heriades carinata. The species is distinguished from allies by distinctive yellow body markings and reduced size.
Vespula infernalis
cuckoo yellowjacket, American cuckoo yellowjacket
Vespula infernalis is an obligate social parasite (inquiline) that invades and usurps colonies of other yellowjacket species, primarily Vespula acadica in North America. Unlike most parasitic wasps, it exhibits intensely aggressive behavior during colony takeover, using specialized morphological adaptations including a large, heavily curved stinger to subdue host workers. The species lacks a worker caste and cannot build nests or rear its own young, instead forcing host workers to feed and care for its brood through dominance behaviors including mauling and forced trophallaxis.
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