Explanation of Names
"Canadensis" is a misnomer. The species does not occur in Canada. Likely, it was described based on specimens that were mislabeled as coming from Canada.
Very similar to Polistes major castaneicolor but with a narrower first abdominal segment (dorsal view).
Southern Arizona to northern Argentina. Widespread in tropical Central and South America. In the U.S. only known from extreme southern Arizona.