. Zoologie : pour les étudiants et les lecteurs en général . Zoologie. 332 ZOOLOOT. En ce qui concerne maintenant le côté du corps sous l'insertion de l'aile (cochon. 279), nous voyons le côté qu'au milieu de chacun des segments thoraciques postérieurs et est composé de deux pièces, episterimm^, antérieure, en appui sur le sternum, le epimermn witli derrière elle ; ces pièces sont verticalement hautes et étroites, et pour eux la jambe est inséré par trois pièces, appelés respectivement toxa, trochantine {trochanter, et sui cochon. 279), ce dernier formant une véritable articulation de la jambe. Les jambes se composent de cinq articulations bien marquée, le fémur (cuisse), ti

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. Zoology : for students and general readers . Zoology. 332 ZOOLOOT. Turning now to the side of the body under the insertion of the wing (Pig. 279), we see tliat the side of each of the middle and hind thoracic rings is composed of two pieces, tlie anterior, episterimm, resting on the sternum, witli the epimermn behind it ; these pieces are vertically high and narrow, and to them the leg is inserted by three pieces, called respectively toxa, trochantine, and trochanter {sqq Pig. 279), the latter forming a true joint of the leg. The legs consist of five well-marked joints, the femur (thigh), tibia (shank), and tarsus (foot), the latter consist- ing in the locust of three joints, the third bearing two large claws with a p)ad between them. The hind legs, especially the femur and tibia, are very large, adapted for hoi^ping. The sternum is broad and large in the middle and hind thorax, but small and obscurely limited in the prothorax, with a large conical projection between the legs. The head is mainly in the adult locust composed of a sin- gle piece called the epicranium (Pigs. 379 and 280, U), which carries the compound eyes, ocelli, or simple eyes (Fig. 280, e), and antennfe. While there are in real- ity four primary segments in the head of all winged insects, corresponding to the four pairs of appendages in the head, the posterior three segments, after early em- bryonic life in the locust, become obsolete, and are mainly represented by their ap- pendages and by small portions to which the appendages are attached. The epicranium represents the antennal segment, and mostly corresponds to the tergum of the seg- ment. The antennte, or feelers, are in- serted in front of the eyes, and between them is the anterior ocellus, or simple eye, while the two posterior ocelli are situated above the insertion of the antennas. In front of the epicranium is the clypeus (Pig. 280), a piece nearly twice as broad as long. To the clypeus is attached a loose flap, which covers the jaws wh

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• bookcentury1800
• bookdecade1870
• booksubjectzoology
• bookyear1879