FORM AND FUNCTION 



279 



Name tlio divisions of the body. 



Name the appendages of the body. 



Name the segments of the legs on one side of the body. 



It will be found more convenient to number the 

 divisions and segments, then write the numbers and 

 corresponding names in a column on the right-hand 

 side of the card-mount. 



Boil another specimen of the same beetle ; separate 

 the parts. With a specimen of the yellow grasshopper 

 in hand and the drawings previously made thereon, 

 make careful observations on the comparative size, 

 shape and relative positions of the following parts of 

 the two insects, and place them in writing: 



The head. 



The prothorax. 



The mesothorax. 



The metathorax. 



The abdomen. 



The mandibles. 



The maxilla?. 



The eyes. 



The prothoracic leg. 



The mesothoracic leg. 



The metathoracic leg. 



The wing-covers (elytra). 



The wings proper. 



MOUTH-PARTS OF THE CICADA. 



Since the mouth-parts of all insects are of two 

 types, mandibulate and haustellate, it is proper that the 

 student should be familiar with the structure of each. 

 The mouth-parts of the grasshopper and the beetle are 



