LOCUSTS, BUTTERFLIES, BEES, WASPS 



159 



wings that extend back\-\-aril over the abdomen when tlie 



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



to the niesotliorax and are long, narrow, and parchnient- 



lilve, for they serve as a protecti\'e covering for the hind pair. 



Tlie hind Avings, wliich are much larger and thinner than the 



front ones, are l^lack ^ 



JrCC 



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 tlie 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 eacli 

 i^ither by thin, flexilde skin, an arrangement that per- 

 mits a certain amount of movement of each segment. 

 The abdomen beai's few appendages, and these are incon- 

 spicuous and at the posterior end. In the female locust 

 the alxlomen ends in four curved, pointed pieces which, 

 togetlier, form the ovipositor. It is used for niaking holes 

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

 small, curved appendages, the cerci. 



Fio. 98. — Lower lip of a locust : Pa, palpi. 



