AMBRIOiiN HOME GARDEN. 



265 



SCALE INSECTS, OR BARK LICE. ' 

 PEAR, OR WRiXKLBD SCALE INSECT. Lecani'um Pyri. 



'■(. Natural size. 

 h. Magnified. 



APPLE SCALE, OR SHELL INSECT. AspidioclotUS Gonchi/ormis. 



Fig. 126. 



a. Natural size. 



b. Maguified. 



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 multijolying until they sometimes cover the tree, some 

 of the larger ones becoming bro-ivnish, and having a rough and 

 angular, turtle-back app)earance. 



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

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

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

 it will be fomid 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 wonn. The scale which covers 

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

 white within. 



M 



