Fig. 2. The aggressive response of L. humile towards heterospecific hydrocarbons, structural classes and controls. (A) Argentine ant response to Formica moki hydrocarbons, individual hydrocarbon structural classes, mixtures of hydrocarbon classes, hydrocarbons extracted from F. moki, and controls. (B) Argentine ant response to mixtures of synthetic hydrocarbon standards and controls. Values are means ± s.e.m. (N=8). The line above the bars indicates that LSD post-hoc analysis showed no statistical difference among the treatments.