LOCUSTS, BUTTERFLIES, BEES, WASPS 



159 



wings that extend backward over the abdomen when the 

 insect is in repose. The wings of the first pair are attached 

 to the mesothorax and are long, narrow, and parchment- 

 Uke, for they serve as a protective covering for the hind pair. 

 The hind wings, which are much larger and thinner than the 

 front ones, are black 

 with a broad yellow - ■>> 



edge. They are at- 

 tached to the meta- 

 thorax and when the 

 locust is at rest, each 

 hind wing is folded 

 like a fan beneath the 

 corresponding one of 

 the front pair. 



The abdomen and 

 its appendages. — The 

 abdomen of the locust 

 is the largest of the 

 three divisions of the 

 body. It is com- 

 posed of a number 

 of plain, ringlike seg- 

 ments, joined to each ^^°- 98- -Lower lip of a locust : Pa, palpi. 



other by thin, flexible skin, an arrangement that per- 

 mits a certain amount of movement of each segment. 

 The abdomen bears few appendages, and these are incon- 

 spicuous and at the posterior end. In the female locust 

 the abdomen ends in four curved, pointed pieces which, 

 together, form the ovipositor. It is used for making holes 

 in the ground in which to deposit eggs. There are also two 

 small, curved appendages, the cerci. 



