Podisus acutissimus Stål is a predaceous pentatomid found only in the SW United States and Mexico. The prey is unknown (Butler and Werner 1960), the insect has rarely been collected in the field, and the species has been sparingly reported in the literature. Butler and Werner (1957 and 1960) collected 23 of the insects in 381 samples taken during 1954–56 from alfalfa, cotton. barley, sorghum, and other plants in the Arizona counties of Maricopa, Pinal, Pima, Santa Cruz, Cochise, and Greenlee. We have collected only 16P. acutissimusin a total of 76,897 sweeps made weekly in alfalfa in Pima County.P. acutissimuswas present in June through September 1970, October and November 1971, and April 1972. (These collections were made in a search for several insect species, of whichP. acutissimuswas 1.)