Sexy Mouth Odour? Male Oral Gland Pheromone in the Grain Beetle Parasitoid Lariophagus distinguendus (Förster) (Hymenoptera: Pteromalidae)

Figure 1

Occurrence of the different mating behaviours ((a) wing fanning, (b) antennal stroking/head nodding, (c) receptivity signal of female, and (d) copulation) in couples with a male in which the mouthparts had been sealed with superglue (red) and in couples with an unsealed male (blue). White bars indicate that the specific behaviour did not occur.