Potter-wasp
Guides
Symmorphus
mason wasps, potter wasps
Symmorphus is a genus of solitary mason wasps in the subfamily Eumeninae, distributed primarily across the Holarctic region with 36 recognized species. These small wasps (6–20 mm) are cavity-nesters that utilize pre-existing holes in wood, hollow stems, or twigs, partitioning them into multiple cells with mud walls. Females are predators that mass-provision nests with paralyzed larvae of leaf beetles (Chrysomelidae), weevils (Curculionidae), or leaf-mining moth caterpillars. The genus occupies a relatively isolated phylogenetic position within Eumeninae and includes two subgenera: S. (Symmorphus) and S. (Parasymmorphus).
Symmorphus albomarginatus
White-bordered Potter Wasp
A small, slender mason wasp in the subfamily Eumeninae. Females construct multi-celled nests in pre-existing wood cavities, provisioning cells with paralyzed leaf beetle larvae (Chrysomelidae), weevil larvae (Curculionidae), or leaf-mining moth caterpillars. Two subspecies recognized: nominate S. a. albomarginatus and S. a. midas from southern Texas. The species ranges across much of North America from Alaska to California and eastward.
Symmorphus canadensis
Canadian potter wasp, Canadian mason wasp
Symmorphus canadensis is the smallest North American species in the genus Symmorphus, measuring approximately 6–10 mm. This solitary mason wasp specializes in hunting leaf beetle larvae, weevil larvae, and leaf-mining moth caterpillars to provision nests constructed in pre-existing cavities. Females partition nest tunnels into multiple cells using mud partitions, laying one egg per cell atop paralyzed prey. The species is transcontinental across North America, absent only from Florida, Texas, New Mexico, and Arizona.
Symmorphus cristatus
Tufted Potter Wasp
Symmorphus cristatus is a solitary mason wasp in the subfamily Eumeninae, widely distributed across North America. It is a specialist predator of leaf beetle larvae (Chrysomelidae), which it paralyzes and provisions in mud-partitioned nest cells. The species exhibits trap-nesting behavior, utilizing pre-existing cavities in dead wood rather than constructing free-standing nests. It serves as a significant biological control agent for several leaf beetle species and is subject to brood parasitism by cuckoo wasps.
Symmorphus projectus
Symmorphus projectus is a small, slender mason wasp in the subfamily Eumeninae. It is strictly western in distribution, ranging from the Pacific Northwest to Montana, Wyoming, and southward. Females nest in pre-existing cavities such as beetle borings in dead wood, provisioning cells with paralyzed leaf beetle larvae, weevil larvae, or leaf-mining moth caterpillars for their offspring. The species is one of four Symmorphus species in North America and can be distinguished from eastern congeners by geographic range and subtle morphological features.
Trypoxylon collinum rubrocinctum
Trypoxylon collinum rubrocinctum is a subspecies of potter wasp in the family Crabronidae. It is native to North America, with confirmed records from Ontario, Canada. As a member of the genus Trypoxylon, it is presumed to construct mud nests provisioned with paralyzed spiders, though specific biological details for this subspecies remain poorly documented. The subspecies was described by Packard in 1867.
Zeta
potter wasps
Zeta is a small neotropical genus of potter wasps in the subfamily Eumeninae, family Vespidae. The genus currently contains four species, with most having restricted geographic distributions. Three species are limited to specific regions: Zeta confusum is endemic to Cuba, Zeta abdominale occurs on several Caribbean islands, and Zeta mendozanum is restricted to the Monte and Patagonia regions of Argentina. Zeta argillaceum is the exception, being widespread and common across much of the neotropics.
Zethus guerreroi
Zethus guerreroi is a species of potter wasp in the subfamily Eumeninae, described by Zavattari in 1913. As a member of the genus Zethus, it belongs to a diverse group of solitary wasps characterized by their distinctive nest-building behavior using mud. The species is known from limited observations, with records primarily from Mexico.
Zethus guerreroi arizonensis
Zethus guerreroi arizonensis is a subspecies of potter wasp in the family Vespidae, described by Bohart in 1950. As a member of the genus Zethus, it belongs to a group of solitary or weakly social wasps known for constructing mud or resin-based nests. The subspecific epithet 'arizonensis' indicates a geographic association with Arizona. Like other eumenine wasps, females provision nest cells with paralyzed prey, primarily caterpillars, for their developing larvae.
Zethus miscogaster
Zethus miscogaster is a species of potter wasp in the family Eumenidae, first described by de Saussure in 1852. The genus Zethus comprises primarily Neotropical wasps, many of which construct mud or plant-fiber nests. This species has been documented in central-western Brazil. Like other members of its genus, it is presumed to be a solitary nesting wasp that provisions its cells with paralyzed caterpillars.
Zethus montezuma
Zethus montezuma is a species of potter wasp in the family Vespidae, subfamily Eumeninae. It was described by Henri de Saussure in 1857. The genus Zethus comprises primarily neotropical potter wasps, with this species representing part of the group's diversity in the southern Nearctic and northern Neotropical regions. As with other eumenine wasps, it is a solitary wasp that constructs mud nests provisioned with paralyzed prey for its larvae.
Zethus spinipes spinipes
Zethus spinipes spinipes is a subspecies of potter wasp in the genus Zethus. It belongs to the family Vespidae (or Eumenidae in some classifications). The genus Zethus comprises solitary wasps that construct mud or soil nests. This subspecies is recorded from the northeastern United States, including Vermont.
Zethus spinipes variegatus
A subspecies of potter wasp in the genus Zethus, distinguished by variegated coloration. As a member of the Eumeninae subfamily, it constructs mud or clay nests provisioned with paralyzed prey for its larvae. The subspecies designation indicates geographic variation in color pattern within the broader Zethus spinipes species complex.