320 



Habits of the Greenhouse White Fly 



Instar V (Fig. 38). 



This is the final stage, or imago. It emerges from a T-shaped 

 crack, the crossbar dividing the pupal abdomen from the thorax, 



Fig. 38. Adult. 



Fig. 39. Empty pupa-case. 



the vertical bar being median, and extending from the crossbar to the 

 anterior margin (Fig. 39). The thorax is the first part to emerge; 

 then the head, with the rostrum and antennae, which gradually 



