Cl|e Canadian |IntomoIa9i$t. 



Vol. XLIX. LONDON, SEPTEMBER, 1917 No. 9 



POPULAR AND PRACTICAL ENTOMOLOGY. 



Undesirable Insect Immigration Into New Jersey. 



by harry b. weiss, new jersey department of agriculture, 



new brunswick,n.j. 



From Europe, Asia and South America, a more or less con- ' 

 stant stream of such undesirables arrives and settles in New 

 Jerse3\ This State by reason of certain specialized agricultural 

 activities, receives more than other States, but what is happening 

 in New Jersey is happening to a less extent in other States. This 

 emigration is not due to the pressure of over-population at home, 

 nor to the pursuit of wealth, nor to political, social or religious dis- 

 content. It is rather an involuntary emigration or one of which the 

 participants are wholly unconscious. 



European officials try to keep them at home because they 

 know that the United States does not want them, and a small army 

 of inspectors on this side of the water is constantly on the watch 

 for them, ready to turn them back if discovered; but in spite of 

 the combined efforts of these officials, in spite of legislation against 

 them, rules, regulations and so forth, some of these creatures con- 

 trive to slip through silently and unobserved, remaining so until 

 later when their unwelcome activities are forced upon the com- 

 munity where they have settled. 



On account of the similarity between the climate - of this 

 country and the northern parts of Europe and Asia and by reason 

 of other similar conditions, many of these emigrants do very well 

 'in Ihis country, especially when allowed to develop to their fullest 

 extent unhampered by enemies and restrictions. One which is 

 comparatively unimportant in its own country may become a 

 serious menace when placed under new and favourable conditions. 

 Fully one-half of the principal injurious hexapods in the United 

 States have been introduced from foreign countries and the in- 

 juries inflicted by them have been enormous, in many cases beyond 



