5. Antennae short, thickish, almost thread-like. Facial scutellum exserted between antennae. Posterior tibiae dilated. Gen. Myrmecophila.[[268]]
5′. Antennae elongate, setaceous. Facial scutellum transverse, visible below the antennae. Tibiae slender.
6. Posterior tibiae armed with two strong spines, not serrate between the spines. Tribe 4. Gryllides. (Fig. 204, Gryllus domesticus; Fig. 211, Platyblemmus lusitanicus.)
6′. Posterior tibiae slender, armed with slender spines, and serrate between them. Tribe 5. Oecanthides.
2′. Second joint of the tarsi depressed, heart-shaped.
3. Posterior tibiae not serrate, but biseriately spinose.
4. The spines on each side three and mobile; apical spurs on the inner side only two in number. Ovipositor short, curved. Tribe 6. Trigonidiides.
4′. The spines numerous, fixed. Ovipositor elongate, straight. Gen. Stenogryllus.
3′. Posterior tibiae serrate and spinose on each side, the apical spurs, as usual, three on each side. Ovipositor straight or curved. Tribe 7. Eneopterides.