THE GRASSHOPPER AND THE SNAIL 49 



men. Note thatthe bodyis made up of rings or segments. 

 In what part of the body are these rings plainest.' The 

 legs are attached to the middle part of the body called the 

 thorax, of which the front part (to which the front legs 

 are attached) is movable and is covered over by a sort of 

 saddle-shaped hood, while the hinder part is solid and 

 box-like. How many pairs of legs are there.'' Exam.ine 

 a single leg and make a drawing of it, showing of how 

 many parts it is composed and how each part appears. 

 Of what use are the claws and the little pads on the 

 under surface of the foot.'' To what part of the body 

 are the wings attached '! Note how the narrow thicker 

 fore wing covers and protects the plaited delicate hind 

 wing when the wings are folded. When the locust flies 

 for long distances it rises high into the air, until it finds 

 an air current; then it simply lets its large outspread 

 hind wings act as flat sails to hold it up, thus allowing 

 it to float for many miles. In this way the Rocky Moun- 

 tain locusts sail or fly soinetimes a thousand miles ; all the 

 way from Wyoming to Kansas. Note the many veins 

 in the wings. What are these for.' Draw a front wing 

 and a hind wing. 



On the head find two large compound eyes (see p. 

 22), three very small simple eyes, a pair of many- 

 jointed feelers or antennas, used both for feeling and prob- 

 ably also for smelling, and a set of mouth parts consisting 

 of an upper lip, a pair of hard, blackish-brown jaws or 

 mandibles, a second pair of jaw-like parts called maxillje, 

 each made up of several small pieces and a small palpus 

 or feeler, and an under lip bearing two more small palpi. 

 With the mandibles the locust bites off, and with the help 

 of the other parts, chews bits of leaves, green stems, etc. 

 The palpi are believed to be organs for feeling and tast- 

 ing the food. Draw the front of the head, naming the 

 different parts. 



