Fig. 5. Mechanical linkages between the hind coxae. (A,B) The two hind coxae of Cicadella were separated and then mounted so that their inner faces point toward the observer. The anterior midline is therefore between the two pictures and the posterior midline is at their lateral edges. If the two pictures are folded toward each other along the vertical white bar separating them, then the protrusion (in this insect on the left) and socket (on the right), and the two fields of microtrichia engage with each other. Scale bar, 50 µm. (C) No press stud is present in a nymphal stage of Iassus lanio. Scale bar, 200 µm. Ventral view with anterior at the top.