82 



LOWER PTERYGOTA 



ance is considerably like that of the plant lice, but they 

 have distinct biting mouth parts. They are totally different, 



Fig. 42.— Clothilla. 



Fi(i. 48. — Work of Atropos on grain. (Plioto from Ohio Exp. Sta.) 



though, in their method of reproduction. The more interest- 

 ing members of the group are those which are wingless 



