1911] 



Specific Characters in Pseudococcus 



325 



Marginal Wax Filaments. The number, length and 

 stoutness of the marginal wax filaments is a character often 

 used. The length of the filaments compared to the length of 

 the body and to each other is the form most used. The favor- 

 ite character for separating longispinus Targ. and citri Risso 

 is the extreme length of the caudal filaments in the former. 



