HOW ANIMALS EAT 



259 



horny jaws (mandibles and inaxillce\ which work hori- 

 zontally between an upper (labrum} and an under (la- 

 bium} lip. The maxillae and under lip carry sensitive 

 jointed feelers (palpi). The front edge of the labium is 



FIG. 219. Mouth of a Locust, dissected and much magnified: i, labrum, or upper lip; 

 2, mandibles; 3, jaws; 4, labium, or lower lip; 5, tongue. The appendages to the 

 maxillae and lower lip are palpi. 



commonly known as the tongue (ligtdd)^ In such a 

 mouth, the mandibles are the most important parts ; 

 but in passing to the suctorial insects, we find that the 

 mandibles are secondary to the maxillae and labium, 

 which are the only means of taking food. In the bee 



