U. S. Dept. of Agriculture, Manual of Dangerous Insects. 



Plate II. 



Dangerous Scale Insects. 



Fig. 1. — The bamboo scale (Chionnispis graminis). Fig. 2.— The (luted scale {*Icerya purchasi). 

 Fig 3. — The citrus scale {*Pseudococcus citri). ^''g. t. — * Coccus hesperidum, a scale of citrus 

 tea, and palms. (Original, Sasscer.) 



