potter and mason wasps

(Euodynerus spp.)

pitted mason wasp
Photo by Alfredo Colon

Euodynerus is a genus of potter and mason wasps. There are at least 117 Euodynerus species worldwide, 26 species in North America north of Mexico, and at least 6 species in Minnesota.

Euodynerus are solitary wasps. Some females nest in hollow twigs, others in burrows in the ground. All species provision the nest with butterfly or moth caterpillars.


Euodynerus are larger wasps, usually more than (9 mm) long. The body is black with well-developed yellow or ivory (pale) markings, and sometimes also with rust-colored markings, on both the front (mesonotum) and rear (metanotum) parts of the body.

There is a pale spot at the base of each jaw (mandible). There is also a pale spot behind each eye, and it is usually small. On the male, the antennae have 13 segments and they are hooked at the end. On the female the antennae have just 12 segments and they are not hooked at the end.

On the pronotum there is a raised ridge (transverse carina) on the front margin. The front face of the pronotum does not have two pits in the middle. On the first segment of the abdomen (propodeum), fused to the thorax on all wasps, the rear corners are angled. The propodeum is short, not petiole-like. It is no more than 1.4 times longer than wide, and it is at least 0.7 times as wide as the second segment.

On the rear part of the body there is always a pale stripe on the rear margin of the first segment (tergite) and almost always another on the second tergite. The first tergite does not have a transverse carina.


Distribution Map



4, 24, 27, 29, 30, 82.



Hymenoptera (ants, bees, wasps, and sawflies)  


Apocrita (narrow-waisted wasps, ants, and bees)  
  No Rank Aculeata (ants, bees, and stinging wasps)  


Vespoidea (vespoid wasps)  


Vespidae (hornets, paper wasps, potter wasps, and allies)  


Eumeninae (potter and mason wasps)  

Subordinate Taxa


black-and-white mason wasp (Euodynerus leucomelas)

cryptic mason wasp (Euodynerus crypticus)

Hidalgo mason wasp (Euodynerus hidalgo)

pitted mason wasp (Euodynerus foraminatus)

potter or mason wasp (Euodynerus boscii)

ringed mason wasp (Euodynerus annulatus)






Common Names


This genus has no common name. The common name of the Subfamily Eumeninae is potter and mason wasps, and it is used here for convenience.










The principal exoskeletal plate on the upper (dorsal) part of the middle segment of the thorax of an insect.



In Hymenoptera: the last segment of the thorax, anatomically the first segment of the abdomen.



The upper (dorsal), hardened plate on a segment of the thorax or abdomen of an arthropod or myriapod.






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Other Videos
  Hymenoptera of North America

Jul 13, 2022

  Euodynerus sp. Potter Wasp
margy stewart

Mar 3, 2022

This striking wasp was nectaring on volunteer Hairy Asters in our back yard. Hairy Asters (Symphyotrichum pilosum) are a wildflower of the tallgrass prairie. Geary County, Kansas, October 2021.




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Created: 2/21/2023

Last Updated:

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