On a visit to lake Winnibigoshish, Minnesota, on August 26, 1932, my attention was attracted by numbers of this wasp engaged in dragging the mature larvae of the Notodontid moth, Symmerista albifrons S. and A. over the sandy surface of the broad beach. The lake shore is about 300 feet wide at that place and composed of several distinct levels. The lower areas nearest the water are covered with low growths of willow and poplar, among which the wasps seemed to prefer to bury the paralysed caterpillars. The latter had developed on the oaks in the forest bordering the lake and several were seen crawling on the sand below the trees, presumably seeking places for pupation. The wasps doubtlessly seized their victims on the ground.