Practical Aids to the Study of Natural History

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I(. Upper jaw. . Upper lip. /. Undor lip. Branous tongue. The organs constructed for suction consist essentially of the same parts, but arranged in the form of a tube or sucker, or in the form of a trunk or proboscis. The trunk is divided into three segments, called, respectively, the anterior, middle, and poste- rior pectoral rings, which adhere more or less strongly to each other, and to each of which one pair of legs is attached (see fig. 148). Each leg is composed of Fio. 148. Outer Skeleto...n of the Cockchafer (Mdolontha vulgarit). A. Head. 6. Anterior pectoral ring. C. Middle pec- rest, h. ZOOLOGY. 49 the thigh, the shanlc, or leg, and the foot (fig. 138). Most winged insects have four wings, two of them, the anterior or superior pair, being attached to the middle pectoral ring, and the other two, the posterior or inferior pair, to the posterior pectoral ring (fig. 148). The abdomen is divided into a number of rings or segments, varying from three to nine ; it either adheres in its entire breadth to the truak, or is attached to the latter simply by a stalk or pedicle.

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