10mm to 20mm, narrow waist, distinctive banding in bright yellow and black, two pairs of membranous wings. Both wasps are very similar to look at.
Habitat & Breeding
Queen emerges from hibernation in mid-April, constructs 10-20 chambers and lays eggs in each one. Sterile female workers hatch and by late summer the colony reaches 3,000 to 30,000 individuals. Males and new queens are produced in late summer, males mate with the new queens and then die. The queen wasps in turn fly off to find an over winter hibernation site usually inside buildings or hollow trees.