575 



generally a light gray. The full grown specimens measure nearly 

 one line in diameter, and its form is more convex than the other 

 species of aspidiotus referred to in these pages. 



Remedies. In winter use Nos. 10, 14, 20, or fumigate with 

 No. 18 (see pp. 490-492). 



Natural Enemies. While yet no true parasite of the greedy 

 scale has been discovered, yet there are a number of predaceous 

 ladybirds in this State which feed upon it, and accomplish a great 

 deal in reducing their numbers. 



MTJSSEL SCALE (Mytilaspis pomorum, Bouche). 



This scale insect is a serious pest of the apple trees in various 

 parts of the world ; it also infests the pear and other fruit trees, 

 but it displays a partiality for the apple. 



Mussel Scale of the Apple (Mytilaspis pomorum, Bouche). 



Mytilaspis pomorum: a and b. females enlarged; c, natural size; d, male 



enlarged ; e, natural size. After Dr. L. O. Howard. 



This species can be readily distinguished from the other species 

 of scale insects that infest apple trees and mentioned in this else- 



