Figure 5.

Cross-attractant responses of male wasps, C. glomerata (A,B) and C. marginiventris (C, D), to con- and inter-specific female cues in a six-arm olfactometer. Interspecific cues were either tested in combination with conspecific cues (A,C) or alone (B,D). The proportion of wasps that showed no response, i.e., that did not choose an arm, is given in red in the pie chart, supplemented with the absolute numbers of wasps. Statistical differences (p < 0.05) are indicated with different letters above the bars.