THE MONTHLY BULLETIN. 



115 



THE CHERRY SCALE. 



Eulecanium cerasorum (Ckll.). 

 (Pig. 9S.) 



General Appearance.— The full-grown scales are exceedingly large, 

 often obtaining a height of three eighths of an inch, though the average 



Fig. D8. — The cherry scale, 

 Eulecanium c e r a s o r u m 

 (Ckll.), on pear. Slightly re- 

 duced. (Original.) 



is slightly over a quarter of an inch. The general shape is hemispher- 

 ical, and the bodies are very irregular and lobed. The general color 

 is rich brown, mottled with creamy white. The markings are more or 

 less regular and constant. The entire surface is highly polished and 

 shiny. 



Distribution.— In the bay region, especially in Contra Costa County. 



Food Plants.— This scale works upon the branches of cherry and 

 pear trees, collecting in such great numbers as to do considerable 

 damage. 



Control.— Same as for black scale on deciduous fruit trees or for 

 the European fruit scale. 



THE FROSTED SCALE. 



Eulecanium pruinosum (Coq.). 

 (Figs. 99, 100.) 



General Appearance.— This is one of the largest unarmored scales, 

 often one half an inch long, and three fourths as wide. The full grown 

 scales are nearly hemispherical in shape (Fig. 99), while the young and 



