Sixty nests of Anthophora terminalis Cresson were obtained from sumac stick trap-nests during 1952-1962. The cells were constructed with sawdust chewed from the walls of the hole drilled in the trap. Each cell was 7 mm. wide and 11 mm. long, lined with a salivary secretion, and separated from adjacent cells by partitions. The mean number of cells was 5.8 (range 1-11). A sawdust plug was constructed on top of the last cell, and usually located a few inches from the orifice of the hole. Provisions in the cells normally had a "sour" odor, and in many cells the provisions were spoiled. Adults were reared with difficulty, as the larva did not spin a cocoon. In nests with both sexes, the females invariably preceded the males. A nest found in a dead poplar log was essentially the same as those made in the traps. Floral hosts included Stachys palustris L., Nepeta cataria L. and Epilobium angustifolium L. There was one generation a year in Wisconsin.