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Species Pachodynerus erynnis - Red-marked Pachodynerus

Another red and black wasp - Pachodynerus erynnis wasp sp. - Pachodynerus erynnis Wasp - Pachodynerus erynnis Black & red wasp visiting wet sand - Pachodynerus erynnis - female Unknown Wasp - Pachodynerus erynnis Wasp - Pachodynerus erynnis Potter or Mason Wasp - Pachodynerus erynnis Stocky mud cell wasp - Pachodynerus erynnis
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon (Aculeata - Ants, Bees and Stinging Wasps)
Superfamily Vespoidea (Yellowjackets and Hornets, Paper Wasps; Potter, Mason and Pollen Wasps and allies)
Family Vespidae (Yellowjackets and Hornets, Paper Wasps; Potter, Mason and Pollen Wasps)
Subfamily Eumeninae (Potter and Mason Wasps)
Genus Pachodynerus
Species erynnis (Red-marked Pachodynerus)
Other Common Names
Red-and-black Mason Wasp (note: applies to several species, particularly in Florida)
Red-marked Keyhole Wasp
Explanation of Names
Pachodynerus erynnis (Lepeletier, 1841)
Forewing: ♂ ~9 mm, ♀ 10.5–11 mm(1)
P. erynnis is the only red-marked species of its genus in the US (Matthews & Gonzalez 2004). However, the same general color pattern is shared by various Eumeninae species in Florida (Euodynerus, Parancistrocerus, Stenodynerus). Pachodynerus erynnis can be readily distinguished easily from these look-alikes by the absence of a red spot behind the eyes, in addition to structural differences (e.g. T1 of the abdomen).

            P. erynnis                            Face, ♀                      Face, ♂
se US (occasionally strays into so. ON)(1)
Often nests under siding boards of buildings
Adults are nectar feeders and hunt caterpillars as food for larvae
Life Cycle
Solitary. A parent wasp builds mud cells or uses empty cells of other mud-building wasp species, provisioning the nest with caterpillars. One larva per cell.
seen using empty cells built by Zeta argillaceum, a neotropical species recently introduced to Florida. May also re-use nests of mud-dauber wasps or build its own.
probably parasitized by Chrysis angolensis
See Also
In Florida, there are several other species with a red-and-black color pattern. Several of these are found in local subspecies.

     Euodynerus apopkensis              E. boscii                         E. castigatus

    Parancistrocerus fulvipes            Par. histro                     Par. salcularis

    Stenodynerus histrionalis        S. fundatiformis                 S. lineatifrons
Print References
Matthews R.W., Gonzalez J.M. (2004) Nesting biology of Zeta argillaceum (Hymenoptera: Vespidae: Eumeninae) in southern Florida, US. Fla Entomol 87: 37-40. Full text
Internet References
Fact sheet (Laplante et al. 2020)(2)
Fact sheet (Linton 2015)
Works Cited
1.Identification Atlas of the Vespidae (Hymenoptera, Aculeata) of the Northeastern Nearctic Region
Matthias Buck, Stephen A. Marshall, and David K. B. Cheung. 2008. Biological Survey of Canada [Canadian Journal of Arthropod Identification].
2.University of Florida: Featured Creatures