24 



BRITISH CICADiE. 



CI XI US. 



Costal granules larger than those on 

 other nerves. 



Costal grannies equal 

 to, or hardly larger 

 than, nerve granules. 



Nerve granules 

 roundish. 



O 





O 



O P 



CO 



o 



CO 

 I— I 

 CO 



O 

 ^^ 



w 



td 



CO 



1—1 



o 



fe 



