58 



CALIFORNIA CITRUS CULTURE. 



FIG. 33. Purple scale. Leoidosavhes beckii CXewm.). 

 on leaf. (Essig, Bull. 2, C. Pom. Cl.) 



FIG. 34. Adult citrus white fly 

 (Aleyrodes citri R. & H.). En- 

 larged fifteen times. After 

 Quayle. Courtesy California 

 Experiment Station.) 



