26 BIOLOGICAL SURVEY OF 



The lady-beetles, lace wings, and syrpliid flies, the great 

 enemies of the plant-lice, are also abundant and largely in- 

 strumental in keeping these prolific and destructive insects 

 within bounds. The rich insect fauna of Mt. Desert shows 

 that we are still dealing in places with an almost undisturbed 

 ecological condition. That this will not continue is apparent, 

 for the gypsy moth is here and will be a major problem as 

 well as the spruce sawfly, while the 'parking' of the woods 

 by removing trees, stumps, etc., will upset the balance still 

 further. Introduced without their parasites and other natural 

 enemies, the only immediate recourse is in spraying with 

 the result that many of our native species disappear, the 

 balance of nature is disturbed and the diversity and heauty 

 of our insect fauna are gone. 



COLLECTING 



In order to stimulate interest in the collection and study 

 of insects, I have included notes on how to collect, and where 

 to look for many of the species, for it is my hope that more 

 people will take the trouble to interest themselves in this class. 



Aside from the aesthetic interest, insects are by far the 

 most interesting of any live thing, when one looks into their 

 habits and life history. Few people realize that man is abso- 

 lutely dependent upon insects for his existence. Fewer still 

 know anything about them. 



Finally, I expect to issue supplements to this list from 

 time to time, and I hope that anyone who wishes to include 

 any insects taken on the Island will send me authentic records. 

 Also in this list as in all others there must be some errors. 

 Please call them to my attention so that corrections may be 

 made in the supplements. 



