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Fig. 10. Projections of two right tripod arm tips (P and either V or Q) on the axis
of abductionadduction in Melolontha hippocastani (A) and
Prionus coriarius (B). Abscissa shows turn of elytra, in degrees,
while the ordinate shows values in mm, positive upwards. HP, HQ, HV, location
of projections relative to the center of rotation. Small scatter about zero
for the arm P confirms proper reconstruction of flat rotation of this arm;
trends in arms Q or V indicate additional supination.