3. Head short, as if compressed from in front.
4. Body bladder-like, inflated.[[244]] [Pronotum covering half the abdomen.] South African species. Tribe 2. Pneumorides. (Fig. 182, Pneumora scutellaris.)
4′. Body ordinary. Tribe 3. Mastacides. (Fig. 181, Mastax guttatus.)
3′. Head very elongate. [Body apterous or sub-apterous.] Tribe 4. Proscopiides. (Fig. 178, Cephalocoema lineata.)
2′. Antennae longer than the anterior femora.
3. Prosternum unarmed.
4. The plane of the vertex of the head meeting the plane of the front of the head as an angle. The former produced or declivous. The face looking down. Tribe 5. Tryxalides. (Fig. 165, Tryxalis nasuta; Fig. 173, Mecostethus grossus.)
4′. Planes of the vertex and front of the head connected in a rounded manner. Face looking forwards. Tribe 6. Oedipodides. (Fig. 177, Pachytylus; Fig. 185, Methone.)
3′. Prosternum with an elevated lamina in front, either irregularly swollen or mucronate.
4. Foveoles of the vertex superior, contiguous, forming the apex of the vertex. Face looking much downwards. Tribe 7. Pyrgomorphides. (Fig. 183, Pyrgomorpha grylloides.)