Annals Entomological Society of America
The species of Cerceris are among the prettiest of our entomophilous wasps; usually black, with bands and spots of yellow, of the general appearance of many species of Crabro. They are most abundant on flowers in July, some occur in June, and others as late as October. They are not especially shy, so are readily taken in the net.
Banks, Nathan, "Notes on the Eastern Species of Cerceris (Hym. Philanthidae)" (1912). An. Paper 204.