1G6 



Annals Entomological Society of America [Vol. XIII, 



VIII. Life Cycle of Aspidiotus perniciosus. 

 Fertilized Eggs. 



Male and Female 



1st Instar (12 days), indistinguishable — 

 Legs, antennae, rostrum and simple eyes 

 present; active. 



Male 



2nd Instar (6 days) — Eyes large, 

 beak functional, legs and antennse 

 lacking. 



3rd Instar (2 days) — Rostrum 

 lacking, developing eyes large, 

 wing pads and developing antennas 

 and legs all external and free; 

 inactive. 



4th Instar (4 to 6 days) — Head, 

 antennae, legs, wing pads and 

 style are well formed, rostrum 

 lacking. 



5th Instar, Adult— 2 wings; legs, 

 antennae and eyes functional, ros- 

 trum lacking. 



Female 



2nd Instar (8 days) — Simple eyes, 

 legs and antenna lacking, ros- 

 trum functional. 



3rd Instar — Adult, produces young 

 for 6 weeks. Legs and antennae 

 lacking and rostrum functional. 



Young are produced ovi-viviparously, 

 the fertilized eggs vmdergoing devel- 

 opment within body of the female. 

 (Sometimes oviparousl3\) 



(Adapted from Pergande, 1895.) 



