THE GREENHOUSE THRIPS. 5 



epidermis appears full of miinite white spots. As attack continues 

 the spots become more numerous and unite, forming blotches where 

 the leaf is damaged. Figures 4 and 5 shows leaves of croton badlv 



Fig. 5.— Croton leaves shovvmg bleaeli and black and brown spots due to fopdins,' of the greenhouse 



thrips. (Original.) 



injured by this insect. The injury then becomes apparent from tlic 

 surface and develops a twisted and distorted aspect between the 

 lateral veins, and is fuially evidenced by wilted and dead areas 



