CLASSIFICATION AND DESCRIPTION OF COMMON INSECTS 131 



and on the green tips of twigs. In Sept.-Oct. they migrate back to 

 the twigs. Winter is passed as partly grown insects. 



Mealy Bugs (Dactylopin^) 



Greenhouse plants are often injured by Mealy Bugs, which are 

 mealy in appearance and are able to move about freely. The scale is 



Orthepa 

 insignis 



Ps.longispinu5 ^ Kermes pubescens 



Fig. 81. — A, Pseudoccus citri showing adult female, anal ring and penultimate 

 segment (i), antenna of adult female (2). B, Pseudococcus longispinus, showing 

 adult female, antenna (i), anal ring and penultimate segment (2). C, Kermes 

 pubescens. D, Orlhezia insignis. E, Pseudococcus trifolii, showing anal ring and 

 penultimate segment (3), anterior leg of adult female (4), and antenna of adult 

 female (5). (After Sanders.) 



absent and at maturity they secrete a cottony sack within which are 

 deposited the cream-colored eggs. The following species are common: 



