PART I. — INSECTS AND THEIR CONTROL. 



CHAPTER I. 



INTRODUCTORY. 



At first blush a list of the insects occurring in the State of New 

 Jersey, including therein Staten Island, which belongs to it geo- 

 graphically if not politically, does not seem to have very much 

 economic value. Yet a little consideration will show that from 

 several points of view even a mere enumeration of the species is of 

 importance, and when we consider that insects are unevenly dis- 

 tributed, and that not all species extend throughout the State, it will 

 be readily recognized that some crops may be safely raised in one 

 locality which would be injured in another. 



In some parts of our State we have a single brood only of the Cod- 

 ling moth. In others there is at least a partial second brood, and the 

 economic importance of this lies in the fact that whereas one or two 

 sprayings early in the season will protect the farmer where one 

 brood only occurs, it will require midsummer work and much more 

 thorough spring applications to prevent injury to the grower where 

 two broods are normal. 



It becomes important also to ascertain in what proportion our 

 friends among the insects are present, and to get as far as possible a 

 fairly complete picture of the actual state of affairs in the insect 

 world, so far as it relates to the farmer. 



When we consider the number of species that are enumerated here 

 it will be seen at once that any attempt to give even a brief descrip- 

 tion or some information concerning the life habits of each would 

 carry the book beyond all reasonable bounds ; but this is not really 

 necessary, because, broadly speaking, all the species of the same 

 genus and generally of the same family have very similar life habits. 

 By introducting illustrations, therefore, of the injurious or beneficial 

 types in each group, supplemented by introductory notes to each 

 order, it is hoped that some knowledge can be given that will enable 

 the farmer who will take the trouble to do it, to tell whether he has 



