168 



NATURE-STUDY REVIEW 



I6:r)-Sept.,l910 



11. ADULT 



done its damage by autumn, at which time the 

 adults fly about and seek places in which to 

 hibernate. 



Hessian fly, Mayetiolu destructor. In 

 regions where this pest occurs, the habits of 

 the autumn generation should be studied. 



Codling moth, Carpocapsa poynonella. 

 The larvae are often as common in red haws 

 as they are in apples. They hibernate in 

 cocoons, which can be found under flakes 

 of bark on old apple trees that have recently 

 borne fruit. 



Fk; 12 



CHINCH BUG 



Peach tree borers, Sanninoidea exitiosa, Synanthedon picti- 

 pes. The lafvae of various sizes are easily dug out of their bur- 

 rows, which are located by means of the gummy exudation. 



Fruit-tree bark-beetle, shot-hole borer, IScolytus riigulosus. 

 (Fig. 13.) In autumn adults are com- 

 mon especially on peach and plum trees. 

 The small round holes in the bark open 

 into the characteristeric galleries be- 

 tween the bark and the wood. The 

 larva winters in a chamber in the wood, 

 a few millimeters below the bark. 



Plum curculio. Conotrachelus nenu- 

 phar. The beetles, even though common 

 in autumn, are difficult to find on the 

 ground but are occasionally found under 

 chips or boards near plum trees or seen 

 on the trees in daytime. In summer, it 

 is an easy matter to get larvae, pupae 

 and adults from fallen plums placed on a layer of compact, damp 

 earth. 



Wooly plant louse, Schkoneura lanigera. The white wooly 

 clusters of this aphid are conspicuous on apple, occurring either 



Fici. 13. 



SHOT-HOLE BORER 



