312 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 12 



two or three days to insure satisfactory results. This company reports 

 that careful tests show that the milling qualities of wheat treated 

 in this way are not affected. 



The Rice Weevil, Calandra oryzae, is the most common beetle found 

 in all of the shipments of Australian wheat, that I have examined. 

 In some lots the grain weevil, C. granaria, was also very abundant, 

 in other shipments but few were found. The saw-toothed grain 

 beetles, Silvanus surinamensis, were always abundant. The confused 

 flour beetles, Triholium confusum, were common in all shipments, 

 and T. ferrugineum was also often quite common. The lesser grain- 

 borer, Rhizopertha dominica, was always quite abundant and appar- 

 ently very destructive. The flat grain beetle, Laemophloeus minutus, 

 was common in all lots. The cadelle, Tenebroides mauritanicus, and 

 a few other beetles were more or less common. 



Mesaporus calandrae How., the cosmopolitan parasite of grain 

 weevils, was common on nearly all lots of Australian wheat examined 

 and it was exceedingly abundant in some of the lots. 



Chairman H. J. Quayle: There are a number of papers on file 

 with the Secretary to be read. Inasmuch as the authors are not present 

 to read these papers, I am going to ask the Secretary to read them by 

 title only. They will be included in the proceedings and can be read 

 by all of us at some future time. 



INVESTIGATIONS OF THE BEET LEAFHOPPER (EUTETTIX 

 TENELLA BAKER) IN CALIFORNIA 



By Henry H. P. Severin, Ph.D., California Agricultural Experiment Station 



I. Introduction 



Where do the enormous numbers of beet leafhoppers {Eutettix 

 tenella Baker), which invade the cultivated districts, come from in the 

 spring? Where do the hoppers go in the autumn after leaving the 

 cultivated area and where do they spend the winter? These are ques- 

 tions that have been asked repeatedly by agriculturists and have 

 baffled scientists during the past thirteen years. Are there other 

 plants from which the leafhoppers transmit curly leaf disease to sugar 

 beets? These subjects and a consideration of the life history and 

 related topics will receive attention. 



In California, Dr. E. D. Ball (1), former director of the Utah Agri- 

 cultural Experiment Station, endeavors to trace the origin of the pest 

 in the beet fields through migrations from desert breeding areas in the 



