JOURNAL 



OF 



ECONOMIC ENTOMOLOGY 



OFFICIAL ORGAN AMERICAN ASSOCIATION OF ECONOMIC ENTOMOLOGISTS 



Vol. 10 APRIL, 1917 No. 2 



Proceedings of the Twenty-Ninth Annual Meeting of the 

 American Association of Economic Entomologists 



(Papers carried over or read by title) 



THE GREEN-BUG (TOXOPTERA GRAMINUM ROND.) 

 OUTBREAK OF 1916 



By E. O. G. Kelly, Wellington, Kans. 



Introduction^ 

 The green bug {Toxopfera graminum) occurred in destructive num- 

 bers in Kansas and Oklahoma in the spring of 1916. This insect has 

 been fully discussed in Bulletin No. 2, volume 9, of the University of 

 Kansas, and in Bulletin 110 of the Bureau of Entomology, U. S. De- 

 partment of Agriculture. The history of this insect preceding the 1907 

 outbreak is discussed in the above-named publications. 



History, 1908-1916 

 The aphids were present on oats and wheat in early spring of 1908, in 

 Oklahoma and Kansas, but were held in check by the activity of their 

 principal parasite (Aphidius testaceipes) and rains. The}' were found 

 in well established colonies as late as June, in Oklahoma, southern and 

 northern Kansas, Nebraska, Iowa, Minnesota, North and South 

 Dakota, and in July in central Montana, where they were very abun- 



1 Editor's Note: Owing to our limited financial resources, it was necessary to 

 to ask Mr. Kelly to cut his paper in half. He has very kindly complied with our 

 request. 



