Entomology for beginners; for the use of young folks, fruitgrowers, farmers, and gardeners; . mall and obscurely limited in the prothorax,with a large conical projection between the legs. The head in the adult locust is mainly composed of a sin-gle piece called the epicranium (Figs. 2 and 3, E), whichcarries the compound eyes, ocelli, or simple eyes (Fig. 3,o), and antennae. While there are in real-ity four primary segments in the head ofall winged insects, corresponding to thefour pairs of appendages in the head, theposterior three segments, after early em-bryonic life in the locust, become o
Entomology for beginners; for the use of young folks, fruitgrowers, farmers, and gardeners; . mall and obscurely limited in the prothorax,with a large conical projection between the legs. The head in the adult locust is mainly composed of a sin-gle piece called the epicranium (Figs. 2 and 3, E), whichcarries the compound eyes, ocelli, or simple eyes (Fig. 3,o), and antennae. While there are in real-ity four primary segments in the head ofall winged insects, corresponding to thefour pairs of appendages in the head, theposterior 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 theappendages are attached. The epicraniumrepresents the antennal segment, and —Front view of the head of c. spre- mostly corresponds to the tergum of the tus. E, epicrani- J __1l „ , um; c, ciypeus; L, segment. The antennae, or feelers, are m-^eyUeTa°anteCnena; serted in front of the eyes, and betweenthem is the anterior ocellus, or simple eye,ri® while the two posterior ocelli are situated. larbia]ialpalpus1^ above the insertion of the antennae. InKingsieyde*. front of the epicranium is the ciypeus (Fig. 3), a piece nearly twice as broad as long. To theciypeus is attached a loose flap, which covers the jaws whenthey are at rest. This is the upper lip or labrum (Fig. 3).There are three pairs of mouth-appendages: first, the truejaws or mandibles (Fig. 1), which are single-jointed, andare broad, short, solid, with a toothed cutting and grinding THE STRUCTURE OF INSECTS. 7 edge, adapted for biting. The mandibles are situated oneach side of the mouth-opening. Behind the mandiblesare the maxillae (Fig. 1), which are divided into three lobes,the inner armed with teeth or spines, the middle lobe un-armed and spatula-shaped, while the outer forms a five-jointed feeler called the maxillary palpus. The maxillas areaccessory jaws, and probably serve to hold and arrange thefood to be ground
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Keywords: ., bookcentury1800, bookdecade1880, bookpublishe, booksubjectinsects
