Pachodynerus erynnis, known generally as the red-marked pachodynerus or red and black mason wasp, is a species of stinging wasp in the family Vespidae.
Book: Buck . Matthias. Marshall . Stephen A.. Cheung . David K.B.. 2008. Identification Atlas of the Vespidae (HymenopteraAculeata) of the Northeastern Nearctic Region. Biological Survey of Canada [Canadian Journal of Arthropod Identification].