168 



NA TUR E-STl D 1 RE I 'IK J i ' 



16:6— Sept.,1910 



Fig 12 

 chinch bug 



Fig. 11. adult 



done its damage by autumn, at which time the 

 adults fly about and seek places in which to 

 hibernate. 



Hessian fly, Mayetiola destructor. In 

 regions where this pest occurs, the habits of 

 the autumn generation should be studied. 



Codling moth, Garpocapsa pomonella. 

 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. 



pes. 



Peach tree borers, Sanninoidea exitiosa, Synanthedon picti- 



The larvae 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, Scolytus rugulosus. 



(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. Gonotrachelus 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. 



W'oolv plant louse, Schizoneura lanigera. The white wooly 

 clusters of this aphid are conspicuous on apple, occurring either 



Fig. 13. 

 shot-hole borer 



