Fig. 4. Scanning electron micrographs of Cicadella to show the mechanical linkages between the medial surfaces of the hind coxa. The legs were pulled apart before fixation to show the structures involved; ventral views with anterior at the top. (A) Low power, of the two coxae, with the coxo-trochanteral joint on the left more levated than on the right. The white arrows indicate a medially directed protrusion from the coxa on the right and a corresponding socket in the coxa on the left with which it engages. Scale bar, 200 µm. (B) Higher magnification view from the same perspective to show the protrusion and socket, and two arrays of microtrichia on each coxa. These two arrays will also engage the corresponding arrays on the other leg, when the coxae are apposed to each other. Scale bar, 50 µm.