Figure 1 in Antennation and sexual performance of male digger wasps Sphex ingens Smith (Hymenoptera: Sphecidae)

Figure 1. Variation in the number of antennal touches in relation to courtship duration in male Sphex ingens (Hymenoptera, Sphecidae): (a) males that had successful copulations (r = 0.867; t = 15.983; df = n–2; p <0.001), (b) males that had unsuccessful copulations (r = 0.882; t = 16.567; df = n–2; p <0.001).