Bui. 838, U. S. Dept. of Agriculture. 



Plate 1 1. 





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Fig. I.— Characteristic Infestation on Monterey Cypress Twig, Showing 

 the Cottony Excretions of the Cypress Bark Scale, x 0.4. 



Fig. 2.— Characteristic Infestation on the Bark, the Cottony Excretions 

 of the Cypress Bark Scale Protruding from the Crevices, x 2. 



Fig. 3.-The Dry Outer Portions of the Bark Removed, Revealing the 

 Females of the Cypress Bark Scale Underneath, x 4. 



