SMALL SCALES ON BARK OF TRUNK OR BRANCH 257 



Several other species closely resemble the San Jose scale, and on 



superficial examniation can hardly be distinguished from it Thev 



have not, however, so distinct a 



ring and nipple. 

 The Putnam's Scale {Aspi- 



diotus ancylus Putnam) infests 



many kinds of fruit and shade 



trees. It has one generation 



annually. 

 The Cherry Scale (Aspidiotus 



forbesi Johns.) is found on the 



bark of cherry and other fruit 



trees. It is lighter in color 

 than the San Jose scale. 



The European Fruit-scale 

 (Aspidiotus ostreceformis Curt.) 

 attacks principally plums, but 

 occasionally other fruits, except 

 the peach. It produces several 

 generations annually and is 

 often a serious pest. 



Fig. 349.— Branch incrusted Avith Put- 

 nam's Scale. Original. 



FIO. 350 -Cherry Scale. Enlarged ,„ seven ,i„,es natural size. Original. 



