Spider-predator
Guides
Anoplius virginiensis
Virginia Blue-black Spider Wasp
Anoplius virginiensis is a spider wasp in the family Pompilidae. Members of the genus Anoplius are solitary wasps that prey on spiders, paralyzing them with venom to serve as food for their larvae. The species was described by Cresson in 1867 and is known from limited observations.
Aporinellus fasciatus
Aporinellus fasciatus is a species of spider wasp in the family Pompilidae, described by Smith in 1855. Members of this genus are solitary wasps that hunt spiders as prey for their larvae. The specific epithet "fasciatus" refers to a banded appearance, though detailed descriptions of this species' morphology are limited in available sources. Like other pompilid wasps, it likely exhibits the characteristic behaviors of spider wasps, including paralyzing spiders to serve as living food stores for developing offspring.
Auplopus
spider wasps
Auplopus is a large genus of small spider wasps in the family Pompilidae, distributed worldwide except Antarctica. Females construct distinctive barrel-shaped mud nests, often inside pre-existing cavities such as abandoned nests of other wasps, hollows in wood, or rock crevices. They hunt spiders, paralyze them with venom, and amputate the legs before transporting the prey to their nests. The wasps provision each mud cell with one or more paralyzed spiders, lay a single egg on the final victim, and seal the cell. Auplopus species are solitary and non-aggressive, with most activity occurring from May to October.
Auplopus mellipes
Red-legged Spider Wasp
Auplopus mellipes is a small spider wasp in the family Pompilidae, tribe Auplopini. Females construct distinctive barrel-shaped mud cells to house their paralyzed spider prey and developing larvae. The species has a widespread distribution across North America and is most active during summer months. Unlike many spider wasps that dig burrows, Auplopus species are unique among Pompilidae for their free-standing mud nest construction.
Auplopus mellipes mellipes
Auplopus mellipes mellipes is a small spider wasp in the family Pompilidae, tribe Auplopini. Females construct distinctive barrel-shaped mud cells to house their offspring, provisioning each cell with paralyzed spiders. The species belongs to a genus noted for opportunistic hunting of non-web-building spiders and for frequently utilizing pre-existing cavities or abandoned nests of other wasps as nest sites. Adults feed on honeydew from aphid colonies rather than visiting flowers.
Auplopus mellipes variitarsus
Auplopus mellipes variitarsus is a subspecies of small spider wasp in the family Pompilidae, tribe Auplopini. Females construct distinctive free-standing mud cells, typically barrel-shaped and approximately 15 millimeters long, to house paralyzed spider prey and a single offspring. The species exhibits bright metallic blue-green coloration, with females bearing a diagnostic pygidial plate on the abdomen used as a masonry trowel during nest construction. Like other Auplopus, this subspecies is solitary and non-aggressive, feeding on aphid honeydew as adults while provisioning nests with spiders from diverse families.
Auplopus mollis
Auplopus mollis is a small spider wasp in the family Pompilidae, tribe Auplopini. Females construct distinctive free-standing mud cells, typically barrel-shaped and approximately 15 mm long by 7–10 mm wide, often stacked end-to-end in rows of two to five. The species hunts non-web-building spiders, amputates their legs to facilitate transport, and provisions each mud cell with multiple paralyzed spiders before laying a single egg. Adults feed on aphid honeydew rather than visiting flowers.
Chalybion
blue mud dauber wasps, blue mud-daubers, blue nest-renting wasps
Chalybion is a genus of solitary wasps in the family Sphecidae, commonly known as blue mud dauber or blue nest-renting wasps. The genus comprises approximately 49 described species distributed across North America, Africa, Asia, and Australia. These wasps are characterized by metallic blue to blue-black coloration and are notable for their unique nesting behavior: rather than constructing their own nests, they primarily utilize pre-existing cavities, particularly abandoned mud nests of other wasps such as Sceliphron species. They provision these nests with paralyzed spiders as food for their larvae. Some species, notably Chalybion californicum, are significant predators of medically important spiders including black widows (Latrodectus species).
Chalybion californicum
Common Blue Mud-dauber Wasp, Blue Mud Dauber
Chalybion californicum is a solitary mud-dauber wasp with metallic blue coloration, widely distributed across North America. Females are renowned as predators of black widow spiders and other web-building spiders, using specialized hunting tactics including web vibration to lure prey. Unlike most mud-daubers, this species does not construct nests from scratch but instead renovates abandoned mud nests, particularly those of Sceliphron caementarium. The species is not aggressive toward humans and has been introduced to several regions outside its native range.
Chalybion zimmermanni
Zimmerman's Mud-dauber Wasp, Zimmermann's Mud Wasp
Chalybion zimmermanni is a solitary thread-waisted wasp in the family Sphecidae. It is one of two Chalybion species found north of Mexico, distinguished from the widespread C. californicum by its more restricted southeastern and southwestern U.S. distribution, white thoracic hairs, and smoky rather than violaceous wing coloration. Like its congener, it is a spider-hunting wasp that repurposes existing mud nests rather than constructing its own.
Chalybion zimmermanni aztecum
Aztec Mud-dauber Wasp
Chalybion zimmermanni aztecum is a subspecies of mud dauber wasp in the family Sphecidae, commonly known as the Aztec Mud-dauber Wasp. It is one of two Chalybion species found north of Mexico, distinguished from the widespread C. californicum by white thoracic hairs and smoky rather than violaceous wing coloration. Like other blue mud daubers, females are solitary nesters that remodel abandoned mud nests rather than constructing new ones from scratch, and hunt spiders including black widows to provision their offspring.
Comantella fallei
Comantella fallei is a small to medium-sized robber fly (10-15 mm) found in California and Colorado. Adults are active in early spring and late fall, an unusual seasonal pattern for Asilidae. The species is distinguished by a humpbacked profile, a slender spur on the front tibia, and a distinctive "Mohawk" mane of hairs on the thorax. One observation documents predation on a small wolf spider (Pardosa).
Dipogon
spider wasps
Dipogon is a genus of small spider wasps (Pompilidae) characterized by ant-mimicking dark-banded wings and a distinctive 'beard' of hairs on the maxillary palps used to transport nesting materials. These solitary wasps are primarily forest-dwelling, hunting spiders on tree trunks and constructing multi-celled nests in pre-existing tubular cavities such as beetle tunnels or hollow plant stems. The genus exhibits notable behavioral plasticity in nest construction, using mud, leaf fragments, insect parts, and even stolen bee provisions to form cell partitions.
Dipogon calipterus
spider wasp
Dipogon calipterus is a small spider wasp in the family Pompilidae. Females hunt spiders on tree trunks, sting them into paralysis, and provision underground nests with them. The species exhibits ant-mimicry through dark wing bands and is rarely observed due to its cryptic appearance and behavior. Three subspecies are recognized with scattered distributions across eastern and southern North America.
Dipogon graenicheri
Dipogon graenicheri is a species of spider wasp in the family Pompilidae, described by Nathan Banks in 1939. The genus Dipogon comprises small, ant-mimicking wasps that hunt spiders on tree trunks and construct nests in pre-existing cavities. Species in this genus are rarely observed due to their cryptic appearance and arboreal foraging habits.
Dipogon graenicheri atratus
A subspecies of spider wasp in the family Pompilidae, characterized by its dark coloration. Like other Dipogon species, it is a forest-dwelling wasp that hunts spiders on tree trunks. The subspecies was described by Townes in 1957 and belongs to a genus known for ant-mimicking appearance due to dark wing bands.
Dipogon graenicheri graenicheri
Dipogon graenicheri graenicheri is a subspecies of spider wasp in the family Pompilidae, described by Banks in 1939. As with other members of the genus Dipogon, it is a predator of spiders, hunting on tree trunks in forested habitats. The subspecies is part of a group characterized by dark-banded wings that provide ant-mimicry camouflage.
Emesaya brevipennis
thread-legged bug
Emesaya brevipennis is a thread-legged assassin bug in the subfamily Emesinae, distributed across the New World from North America through Central America to South America. The species comprises three subspecies, all occurring in North America north of Mexico. The nominate subspecies E. b. brevipennis is the most widely distributed and has been documented as bivoltine in southern Illinois, with five instars. This species exhibits specialized predatory behavior, including kleptoparasitism of spider prey and intraguild predation on conspecifics.
Entypus unifasciatus
spider wasp
Entypus unifasciatus is a spider wasp species in the family Pompilidae. Females hunt large spiders, paralyze them with venom, and provision underground burrows as food for their developing larvae. The species exhibits a broad transcontinental distribution across the Americas. Adults display distinctive coloration with black bodies, bluish sheen, yellow antennae, and variable orange-banded wings.
Episyron
Episyron is a genus of spider wasps in the family Pompilidae. Members are medium to large-sized wasps that construct ground nests in sandy substrates and provision them with paralyzed spiders. Nine species occur in Europe, with additional species documented in North America including the northeastern United States.
Episyronini
Episyronini is a tribe of spider wasps within the family Pompilidae. Members are solitary wasps that hunt spiders to provision nests for their larvae. The tribe is distinguished by morphological features of the mesosoma and wing venation. Episyronini species are primarily found in the Americas, with some extending into other regions. They represent a well-supported monophyletic group within the subfamily Pepsinae.
Ero pensacolae
Ero pensacolae is a species of spider in the family Mimetidae, commonly known as pirate spiders. The species was described by Ivie and Barrows in 1935. The specific epithet "pensacolae" references Pensacola, Florida, suggesting a type locality in the southeastern United States. Members of the genus Ero are specialized predators of other spiders.
Mimetus puritanus
Common Pirate Spider, Pirate Spider
Mimetus puritanus is a small araneophagous spider in the family Mimetidae, commonly known as the Common Pirate Spider. It is the most frequently encountered pirate spider species in the eastern United States. Unlike web-building spiders, M. puritanus infiltrates the webs of other spiders—particularly cobweb weavers and orb weavers—to prey upon them. The species exhibits specialized predatory adaptations including fused jaws that restrict gape width, leading it to attack prey spiders by biting their legs sequentially. Adults measure 3–7 mm in body length and are primarily nocturnal.
Mimetus syllepsicus
Mimetus syllepsicus is a species of pirate spider in the family Mimetidae, first described by Hentz in 1832. Like other members of its genus, it is an araneophagic predator that specializes in hunting other spiders rather than building webs to catch prey. The species occurs in North and Middle America, with records from the United States and Mexico. As a mimetid, it exhibits the characteristic predatory behavior of infiltrating the webs of other spiders to ambush and consume them.
Mimetus tillandsiae
Mimetus tillandsiae is a species of pirate spider in the family Mimetidae, first described by Archer in 1941. The species is part of a genus known for araneophagic (spider-eating) behavior, infiltrating webs of other spiders to prey upon them. Like other mimetids, it likely exhibits specialized predatory adaptations including modified leg spines and venom effective against other spiders.
Pompiloidea
Spider Wasps, Velvet Ants, and Allies
Pompiloidea is a superfamily within Hymenoptera comprising four extant families: Pompilidae (spider wasps), Mutillidae (velvet ants), Myrmosidae (myrmosid wasps), and Sapygidae (sapygid wasps). Members are primarily solitary wasps, many of which are ectoparasitoids. The superfamily also includes the extinct family Burmusculidae, known from Cretaceous amber.
Priocnemis
spider wasp
Priocnemis is a genus of spider wasps in the family Pompilidae, subfamily Pepsinae, containing approximately 30 species. These solitary aculeate wasps are specialized predators of spiders, with females hunting and paralyzing prey to provision nest cells for their larvae. The genus has a wide geographic distribution including North America, Europe, and Asia, with species varying in size from small to relatively large among pompilids.
Priocnemis cornica
spider wasp
Priocnemis cornica is a species of spider wasp in the family Pompilidae. It has been documented as a predator of the Beach Wolf Spider (Arctosa littoralis), paralyzing spiders to serve as food for its larval offspring. The species was first described by Thomas Say in 1836.
Priocnemis notha occidentis
Priocnemis notha occidentis is a subspecies of spider wasp in the family Pompilidae, first described by Banks in 1944. As a member of the genus Priocnemis, it belongs to a group of solitary wasps that hunt spiders to provision nests for their larval offspring. The subspecific epithet "occidentis" indicates a western distribution, distinguishing it from the nominate subspecies.
Priocnemis scitula
Priocnemis scitula is a species of spider wasp in the family Pompilidae. It belongs to a genus of medium-sized wasps that prey on spiders to provision nests for their larvae. The species was described by Cresson in 1867. Like other members of Priocnemis, it is a solitary hunting wasp with specific host associations.
Sceliphron
black-and-yellow mud dauber wasps, black mud-dauber wasps, mud daubers
Sceliphron is a genus of solitary sphecid wasps comprising 34 valid species, commonly known as black-and-yellow mud daubers or black mud-dauber wasps. Females construct nests from mud, building individual cells that they provision with paralyzed spiders as food for their larvae. The genus exhibits remarkable synanthropic behavior, with many species readily nesting on human structures. Several species have become invasive outside their native ranges, including S. caementarium (native to North America, now widespread globally) and S. curvatum (native to Central Asia, spreading through Europe and recently detected in North America).
Sceliphron caementarium
Yellow-legged Mud-dauber Wasp, Black and Yellow Mud Dauber, Black-waisted Mud-dauber
Sceliphron caementarium is a solitary sphecid wasp renowned for constructing nests from mud. Females build multi-celled mud nests in sheltered locations, provision each cell with paralyzed spiders, and deposit a single egg before sealing the chamber. The species exhibits remarkable geographic plasticity, having established populations across multiple continents through human-mediated dispersal. Adults feed on nectar and are generally non-aggressive, with stings being rare.
Tachypompilus
spider wasps
Tachypompilus is a genus of spider wasps in the family Pompilidae, distributed across the Neotropics, Nearctic, eastern Palearctic, Indomalayan, and Afrotropical regions. The genus includes approximately 20 described species, several with distinctive common names such as the red-tailed spider wasp (T. analis), rusty spider wasp (T. ferrugineus), and rain spider wasp (T. ignitus). Members are solitary wasps that hunt spiders as food for their larvae.
Tachypompilus unicolor
Western Red-tailed Spider Wasp, Red-tailed Spider Hunter
Tachypompilus unicolor is a solitary spider wasp endemic to western North America. The species exhibits striking sexual dimorphism in coloration and wing morphology. Adults are nectar-feeders, while females provision nests with paralyzed spiders as food for their larvae. Two subspecies are recognized, distinguished primarily by body and wing coloration.
Tachypompilus unicolor unicolor
A spider wasp subspecies in the family Pompilidae. Members of the genus Tachypompilus are solitary, ground-nesting wasps that provision their nests with paralyzed spiders as food for their larvae. This subspecies was described by Banks in 1919.