Fig. 4. Dependence of the area of a single pulvillus on the head width (A) and body mass (B) (N=40) and dependence of the pressure on the substrate on the body mass (C). Each point represents the average pulvillus area (N=12) of an individual insect. In all, 480 pulvilli were measured. (A) Data fit: a=3.009, b=3.197, r²=0.83, ANOVA: F=360.0, P<0.001. (B) Data fit: a=2.820, b=0.576, r²=0.67, ANOVA: F=150.2, P<0.001. (C) Data fit: a=0.101, b=0.424, r²=0.52, ANOVA: F=81.1, P<0.001. Red dotted lines show predicted slopes for regression lines.