THOSE HORRID EARWIGS 145 



the purposes of this sketch. The other parts of 

 the mechanism, I regret to say, can only be de- 

 scribed in painfully technical language ; but as I 

 am generally sparing in my use of technicalities, 



NO. 20. THE EARWIG'S MOUTH, DISSECTED. 



I trust I may be forgiven this solitary slip on the 

 ground of previous good conduct. L is the labium 

 or lower lip, which closes the mouth from below 

 when it is not in action. LP are the labial palpi, 



K 



