This is an early work on the North American species of Vespula and Dolichovespula. It contains keys to the North American species as well as provides distributional maps showing individual species range in the U.S. and Canada. It also lists extensive distributional data based on specimen data and breif biological notes are made for each species.

Here is a link to a readable/downloadable copy: http://www.academia.edu/1884567/Miller_1961_Taxonomy_and_distribution_of_Nearctic_Vespula_Hymenoptera_Vespinae_