4′. Third joint of posterior tarsi longer than the second joint. Anterior tibiae with no apical spine on the inner side, and posterior tibiae with no apical spine on the outer side.
5. Antennae inserted at the edge of the eyes. Pronotum unarmed. Tegmina present in each sex. Anterior tibiae furnished on the outer side with an apical spine. Posterior tibiae furnished beneath with four apical spines. Tribe 12. Ephippigerides.
5′. Antennae inserted distinctly below the eyes. Pronotum spinous. Elytra in the females wanting. Anterior tibiae without apical spine on either side. Posterior tibiae beneath with two apical spines or with none. Tribe 13. Hetrodides.
2′. Anterior tibiae without auditory cavities. Tegmina with no tympanum. Tribe 14. Gryllacrides. (Fig. 201, Schizodactylus monstrosus.)
1′. Tarsi distinctly compressed (most of the species apterous.) Tribe 15. Stenopelmatides. (Fig. 202, Anostostoma australasiae; Fig. 197, Dolichopoda palpata.)
CHAPTER XIV
ORTHOPTERA CONTINUED—GRYLLIDAE, CRICKETS
Fam. VIII. Gryllidae—Crickets.
Antennae very slender, generally long and setaceous; hind legs long, saltatorial. Tegmina with the outer portion deflexed on to the side of the body, and with the inner part lying flat on the body. Tarsi usually three-jointed (rarely two- or four-jointed). Female with a long ovipositor (except in Gryllotalpides). Apterous forms numerous.
The Gryllidae are closely connected with the Locustidae, the musical and auditory organs being in both similarly situate, and the female in both possessing, in most of the tribes, an elongate exserted ovipositor. The two families differ in the number of joints of the tarsi, in the form of the tegmina, and in the fact that in Gryllidae the portion of the wing modified for musical purposes consists of a larger portion of the organ—according to de Saussure, the discoidal as well as the anal area.