Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes



Species Monobia quadridens - Four-toothed Mason Wasp

weevil wasp? - Monobia quadridens Monobia quadridens - Mason Wasp - Monobia quadridens Vespidae? ID please - Monobia quadridens - male Vespidae? ID please - Monobia quadridens - male potter wasp - Monobia quadridens Mason Wasp - Monobia quadridens Monobia quadridens Monobia quadridens
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
Family Vespidae (Hornets, Yellowjackets; Paper, Potter, Mason, and Pollen Wasps; and Allies)
Subfamily Eumeninae (Potter and Mason Wasps)
Genus Monobia
Species quadridens (Four-toothed Mason Wasp)
Explanation of Names
Monobia quadridens (Linnaeus, 1763)
quadridens = from the Latin quadrī ('four, square') + dēns (tooth). Apparently referring to the four "teeth" on the abdominal band.
Forewing: ♂ 11.0–14.5 mm, ♀ 14–18 mm(1)
A single, broad, apical fascia on tergum 1 but otherwise black metasoma.
e US & so. ON west to WI-KS-NM(1)
May-Oct in NC(2)
Adult takes nectar at flowers. Larvae feed on caterpillars of Pyralidae (Phycitinae, Epipaschiinae), Crambidae (Pyraustinae), Elachistidae (Stenomatinae), Amphisbatidae, Gelechiidae and Tortricidae.
Life Cycle
Usually nests in wood borings, but sometimes burrows in dirt banks. Sometimes takes over abandoned nests of carpenter bees or ground bees, also Sceliphron (mud dauber) cells. Nest is provisioned with caterpillars, and cells of nest are separated by mud partitions.
See Also
Euodynerus bidens is similar but less common and has ivory spots behind the eyes:
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.Insects of North Carolina
C.S. Brimley. 1938. North Carolina Department of Agriculture.