CALIFORNIA CITRUS CULTURE. 



FIG. 40. Soft brown scale (Coccus hcsurriduw 

 Linn.), showing exit holes of true parasites. (Al'trr 

 Quayle. Courtesy Cal. Exp. Sta.) 



FIG. 41. Mummied bodies of the citrus aphid (Toxoptera auranticc Koch), showing 

 exit holes of the internal parasites. (Essig, P. C. Jr. Ent.) 



