. Elementary text-book of zoology, tr. and ed. by Adam Sedgwick, with the assistance of F. G. Heathcote. 558 INSECTA. to produce weak chirping sounds. They live principally in fields, meadows and mountains, the larvre being present in spring and summer, and the sexual animals in late summer and in autumn. They fly with a rattling sound, and as a rule, only for short distances. They feed on plants. Tetti-r xulmlnta L., T. l/punctata Charp., (Etlipoda migratoria L., South and East Europe. Enormous swarms migrate together, and distribute themselves in corn-fields, causing much damage. Acridium ta
. Elementary text-book of zoology, tr. and ed. by Adam Sedgwick, with the assistance of F. G. Heathcote. 558 INSECTA. to produce weak chirping sounds. They live principally in fields, meadows and mountains, the larvre being present in spring and summer, and the sexual animals in late summer and in autumn. They fly with a rattling sound, and as a rule, only for short distances. They feed on plants. Tetti-r xulmlnta L., T. l/punctata Charp., (Etlipoda migratoria L., South and East Europe. Enormous swarms migrate together, and distribute themselves in corn-fields, causing much damage. Acridium tataricum L., South Europe. Fam. Locustidse (Laubheuschrccken). The body is elongated and usually coloured grass green or brown. The antennre are very slender, and the wing covers usually lie vertically on the body. The auditory organs are in the tibia of the front legs. The females have a projecting sabre-shaped ovipositor, which consists of a right and left double valve on the eighth and ninth segments ; between the valves there is, on either sida, a style which arises on the ninth segment. The eggs are deposited in the earth in late summer or in autumn, and there pass the winter. The larvae are hatched in the spring, and after many months develop into the winged sexual animal late in the summer. The Locitstidce live in forests and bushes, or in fields on the tops of grass stalks and shrubs. Locusta viri- dissima L., L. cantans Switzerland. EpTiippigera pcr- forata Ross., Italy and South Germany. Fam. Gryllidae (Grabheu- schrecken). Of thick cylindrical body form, with thick free head. Antennte usually long and seti- form ; wing covers (anterior wings) short, placed horizon- tally, and the hind wings, when rolled up, project far beyond them, sometimes digging FlO. 463.—Oryllus campestris $ (r&gne animal). The anterior legs arc The male gives rise to shrill chirping sounds by rubbing his two wing-covers, which present the same structure, against each other,
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