BIOLOGICAL SURVEY or 



The Macrolepidoptera follow the Check List of the Macro- 

 lepidoptera of Canada and the I . S. 1938 by Dr. J. M<- 

 I )nnnough. 



The Microlepidoptera follow the Check List of the Micro 

 lepidoptera of Canada and the U.S. L939 by Dr. J. McDun- 

 nough, with the manuscript checked by Dr. A. E. Brower ( Br.). 



In the Hymenoptera, Dr. C. F. W. Muesebeck has been most 



kind and interested in getting this Order into proper shape. 

 He has cheeked the I >raconidae, and some of the other families, 

 and arranged for the rest to be done. 



The recent publication of the Catalogue of the Neartic 

 Ichnemnonidae by Dr. II. K. Townes, Jr. was a happy event, 

 for it permitted a proper listing of that large and important 

 family. Dr. Townes very kindly helped with the synonomy 

 and read the manuscript. He also helped with the sawflies. 

 Dr. V. S. L. Pate helped revise these Families and also re- 

 vised the Psammocharidae, Sphecidae and Chrysididae. 



The abundance of the parasite wasps and the parasitic flies 

 indicates a normal or balanced condition, these insects keep- 

 ing in check the injurious species. The lady-beetles, lace 

 wings, and syrphid flies, the great enemies of the plant-lice, 

 are also abundant and largely instrumental in keeping these 

 prolific and destructive insects within bounds. The rich insect 

 fauna of Mt. Desert shows that we are still dealing in places 

 witli an almost undisturbed ecological condition. That this 

 will not continue is apparent, for the gypsy moth is here and 

 will he 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 re- 

 course is in spraying with the result that many of our native 

 species disappear, the balance of nature is disturbed and the 

 diversity and beauty of our insect fauna are gone. I shudder 

 when I think of the result from indiscriminate use of D.D.T. 



My purpose in making this list is to add to the general 

 knowledge on the insect fauna of a pari of the Northeastern 

 section of this count rv. 



