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Fig. 5. The articulation of the trochanter and coxa in Aphrophora viewed
dorsally and posteriorly. (A) Drawing to show the trochanter of the right leg
fully depressed and that of the left leg fully levated. A protrusion on the
dorsal surface of the femur (asterisk) engages with the lateral protrusion of
the coxa when the leg is fully levated. The trochanteral depressor muscle
within the thorax is shown. Cuticular parts of the hind leg are coloured
green. (B) Photograph to show the trochanter almost fully levated. The tendon
of the trochanteral depressor muscle can be seen where the dorsal cuticle of
the coxa has been removed; the broken lines show its full width. (C) The
trochanter is fully levated so that the femoral protrusion is engaged with the
coxal protrusion. (D) The trochanter is fully depressed about the coxa. (E)
The trochanter is approximately in the middle of its range of movements. These
photographs also show the insertion of a trochanteral levator muscle on a
lateral cuticular protrusion of the trochanter and the insertion of the
trochanteral depressor on heavily sclerotised medial cuticle of the
trochanter. Cuticular reinforcing struts in the coxa extend anteriorly from
the coxo-trochanteral pivot. Between these struts the tendon of the
trochanteral depressor muscle is visible. (F) Photograph from a medial aspect
to show the prominent femoral protrusion at the proximal end of the femur.
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