62 CALIFORNIA CITRUS CULTURE. 
Tra. 40.—Soft brown seale (Coccus hesperidium 
Linn.), showing exit holes of true parasites. (After 
Quayle. Courtesy Cal. Exp. Sta.) 
Ita. 41.—Mummied bodies of the citrus aphid (Toxroptera aurantic 
exit holes of the internal parasites. (Hssig, P. C. Jr. Tent. ) 
v Koch), showing 
