Insect life; an introduction to nature-study and a guide for teachers, students, and others interested in out-of-door life . ill later. 4. Remove the head of the locust and pin it withthe hinder side uppermost to a piece of cork or blockof w^ood. 5. With the head in this position the flaplikelower lip or labium {labi-tini) can be easily the maxillae, the labium consists of severalparts. 6. Lift the free end of the labium with a pin andobserve the tonguelike organ which arises from the inner side of it, and pro-jects between the maxillae;this is the hypopharynx {Jiy-popharynx). 7. Rem
Insect life; an introduction to nature-study and a guide for teachers, students, and others interested in out-of-door life . ill later. 4. Remove the head of the locust and pin it withthe hinder side uppermost to a piece of cork or blockof w^ood. 5. With the head in this position the flaplikelower lip or labium {labi-tini) can be easily the maxillae, the labium consists of severalparts. 6. Lift the free end of the labium with a pin andobserve the tonguelike organ which arises from the inner side of it, and pro-jects between the maxillae;this is the hypopharynx {Jiy-popharynx). 7. Remove the labiumand the hypopharynx andsave them. 8. After the removal ofthe labium it will be easierto remove the maxillae thanbefore. Remove them andsave them. 9. Arrange the mouth-parts on a card as shownin Fig. 5 and gum them inplace. 10. The five-jointed appendages of the maxillae arethe maxillary palpi. The singular of palpi is palpus. 11. The three-jointed appendages of the lower lipor labium are the labial palpi. Rcviezv.—The mouth-parts of a locust consist ofan upper lip, the labriim; an under lip, the labimn;. Fig. The mouth-parts of a lo-cust : 8, labrum ; 10, mandibles ;II, maxilla?; 11 </, maxillarypalpi; 12, labium ; 12 d, labialpalpi; 13, hypopharynx. THE TARTS OF A LOCUST. jr two pairs of jaws, the mandibles and the maxillcB ; anda tongiielike organ, the liypopharynx. The jaws opensidewise instead of up and down, as do the jaws ofthe higher animals. The upper pair of jaws are calledthe mandibles; the lower pair of jaws the maxilla bears a palpus; these are the maxillarypalpi. The labium bears a pair of palpi; these arethe labial palpi. LESSON IV. THE PARTS OF A LOCUST (CONTINUED). The Appendages of the Thorax, the Legs. The thorax is the middle one of the three regionsof the body (see Lesson I and Fig. 3). The append-ages of the thorax are three pairs of legs and twopairs of wings. In this lesson we will study thelegs. 1. Study carefully one of t
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