INSECTSWall Mason WaspAncistrocerus parietumInsectsIntroduced5 images10 mmLengthHymenopteran in the family Vespidae 10 mm long. Introduced to Québec.There is 1 observation of Wall Mason Wasp in Québec, mostly in Montréal, and it has been reported in 1 of the 17 regions.Where to see itMontréal1
