Observations on the Nesting Behavior of Cerceris watlingensis (Hymenoptera: Sphecidae, Philanthinae)

Females of Cerceris watlingensis were observed nesting on San Salvador Island, the Bahamas, during Nov. and Dec, 1977. Nest digging, orientation, prey selection, prey carriage, nest closure, and nest and cell structure are described. Several nests were snared by 2 or more females. Ants were the only predators seen.