296 AGRICULTURE. 



The Thorax. — The segments of the thorax are the 

 prothorax, mesot/iorax, and iiietathorax. (i) What append- 

 ages has each? Look on the mesothorax, just above 

 the legs, for a pair of spiracles or breathing pores. Do 

 you find another pair between mesothorax and meta- 

 thorax ? (2) Draw the thorax, and label the parts. 



The Legs.— (i) How do the first and second pair of 

 legs differ from tlie third pair in size, and in the direc- 

 tion ii: whicli they extentl from tlie body? Wliv ? 

 What modes of locomotion has the grasshopper ? 



(2) Make a careful study of the hind legs, {a) Note 

 the coxa, a short segment attached to the bod v. Next to 

 it is the trochanter, another short segment. The femur 

 is the large segment following this, attached to which 

 is the slender tibia. With what is the latter armed ? 

 For what purpose? The terminal portion is the ta>sus 

 or foot. Is it segmented ? Note the hooks and pads. 



(/5) Make a drawing of the entire leg, and label each 

 part. 



The Wings. — {a) Note the wings on one side of the 

 body while folded, and their position with reference to 

 the body; with reference to each other. 



{b) Spread them out and compare as to size, shape, 

 color, use, texture, and position. 



(r) Make a careful drawing. 



The Abdomen. — (i) How many abdominal segments 

 do you find ? Are the last three distinct ? 



^2) {a) Look along the groove on each side of the 

 abdomen for spiracles. How many in each of these 

 segments? In Imw many segments are they found? 



(^) Catch a live grasshopper and watch it breathe. 

 Do the walls of the abdomen move ? What movements 

 have the spiracles ? Try to drown the grasshopper by 

 holding its head under water. Exj^lain. 



(3) Find the ear membrane on the side of the first 

 segment. 



