AMERICAN HOME GARDEN. 



265 



SCALE INSECTS, OR BARK LICE. 

 PEAR, OR WRINKLED SCALE INSECT. Lecanium Pyri. 



Fig. 124. 



a. Natural size. 



b. Magnified. 



APPLE SCALE, OR SHELL INSECT. Aspidiodotus Conchiformis. 



Fig. 125. 

 a 



a. Natural size. 



b. Magnified. 



These insects, which are sometimes called the " scale aphis," 

 infest the apple, pear, mountain ash, and other trees and shrubs, 

 appearing upon the bark like small white spots or scales, grad- 

 ually multiplying until they sometimes cover the tree, some 

 of the larger ones becoming brownish, and having a rough and 

 angular, turtle-back appearance. 



If the stem of a tree infested with them be rubbed harshly 

 with a gloved hand, it will appear as if smeared with blood ; 

 and if the outer bark be shaved with a knife, the inner side of 

 it will be found reddened with disease. 



On raising these scales in the fall or winter, they are gen- 

 erally found to be pretty well filled with small reddish-brown 

 eggs and the seeming remains of the insect, among which will 

 sometimes be found a small worm. The scale which covers 

 them is at this season of the year gray outside and silvery 

 white within. 



M 



