204 INSECTS INJURIOUS TO THE CHERRY. 



spring adhering to the under side of the limbs of cherry- 

 trees and sucking their juices. The shell is hemispherical in 

 form, black, more or less mottled with pale dull-yellow dots. 

 On lifting this shell, a mass of minute eggs is found, which 

 shortly hatch, whereupon the insects spread over the bark of 

 the succulent twigs, and, piercing it, subsist upon the juices, 

 passing through the various stages of their growth before the 

 winter approaches. The remedies recommended for L. pyri 

 will be equally applicable in this case. 



No. 108. The Cherry-tree Scale-insect. 



Aspldiotus cerasi Fitch. 



On examining the limbs of the choke-cherry in winter, 

 there will sometimes be found on the bark a small, roundish 

 scale, like a tiny blister, which, when raised, discloses a cluster 

 of very minute dull -reddish eggs, the product of the cherry 

 scale-insect, which is believed to be identical with the scurfy 

 bark-louse, No. 17, and to which the same remedies may be 

 applied. 



ATTACKING THE LEAVES, 

 No. 109. The Violaceous Plea-beetle. 



Crepidodera Helxines (Linn.). 



From about the middle of May until August there may 

 often be found on the leaves of cherry-trees small flea-beetles, 

 about one-tenth of an inch long, and of a brilliant coppery, 

 violet, or greenish-black color, with the antennae of a pale 

 yellow, the under side black, and the legs, except the hinder 

 thighs, dull pale yellow. Though small, this is a very active 

 insect. It gnaws round pieces out of the under side of the 

 leaf, leaving the upper skin unbroken, and sometimes eats 

 entirely through, making numerous small holes in the young 

 leaves, at the ends of the limbs. It has not yet proved 

 sufficiently troublesome to require any special remedy. 



