U. Si. D. A.. B. E. Bui. W, Part I. F. I. I.. June 13, 1906. 



SOME INSECTS INJURIOUS TO FORESTS. 



THE LOCUST BORER. 



{Cijllene robinin' Forst. )" 



By A. I). Hopkins, 

 In Charge of Forest Insect Investigations. 



OBJECT OF PAPER. 



The object of this paper is to ^nve a suinniary of the more important 

 piil)lished information, supplemented by recently determined new facts 

 relating- to the locust borer and methods of controlling it. which will 

 be of service to the investij^ator in the determination of additional 

 facts, and to the owners of plantations and forests in suggesting 

 methods of preventing losses. 



ECONOMIC IMPORTANCE OF THE INSECT. 



The economic importance of the well-known locust ttorcr as atl'ect- 

 ing the growth of the black locust or yellow locust {Rahitud p!<emJ<i- 

 Ciicia) is fully realized by everyone who is interested in this valuble 

 forest and shade tree, and the urgent need of additional information 

 on the subject is indicated by the freipient incjuiries of correspond- 

 ents and by the recent articles in newspapers, journals, and special 

 publications which have been called forth l)v the proposed extensive 

 comnKM-cial planting of th(^ locust l)y lailroatl and other companies and 

 by individuals. 



INVESTIGATIONS. 



In connection with tlu' gcMUMal study of insects injurious to forest 

 trees, the locust borer has received considerable' attention by the writer 

 since 1890/' In March, 1905, a plan of cooperation between the 



" Onler Coleoptera, Family Ceranibycid.'r". 



''From 1890 to 1892 for tlu- WeM Virpinia Kxjieriiiifiit Station, andsincv liMVJ for tlie 

 U. S. Deiiartiiient of Auricultun-. 



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