Several volatile compounds found in cotton were tested for attractancy to the pink bollworm, Pectinophora gossypiella (Saunders). In early-season field tests of these compounds, significant numbers of the green lacewing, Chrysopa carnea Stephens were captured in Delta traps containing 2 g of caryophyllene. Caryophyllene (C 15 H 24 ) is a sesquiterpene hydrocarbon that is a major component of the aroma of a cotton field. Further tests indicated that caryophyllene and β-caryophyllene, a closely related compound, were equally attractive to green lacewings. The numerous unreplicated tests subsequently conducted substantiated this attractiveness. However, the attractancy of caryophyllene appeared to diminish during the midand late season, apparently because of the competition provided by mature cotton in the field at this time. Caryophyllene is a new attractant for the green lacewing and may be a useful addition to the known feeding attractants.