362 



JOURNAL OF ECONOMIC ENTOMOLOGY 



[Vol. 15 



Table IV — Accumulated Egg Counts 



Total 



2254 



362 



I 3072 



73.4 



11.8 



100 



Infestation counts for this sowing were made November 4th before 

 the plants had stooled excessively, though at this time the rye plants 

 were sending out many succulent tillers. The results thus obtained are 

 given in Table V. 



Summary 



Observations from two series of plots made daily throughout the full 

 emergence period of the Fall of 1921 at Centralia, Illinois show that 

 adjacent and identical prepared plots of wheat, barley, rye and oats are 

 subjected to fly attacks in varying degrees. 



The order of selection for oviposition runs in descending order wheat, 

 rye, barley and oats. From data in which daily egg counts were made 

 from a numbered series of plants (Table 1) the total number of eggs be- 

 ing considered 100%, wheat received 68%, barley 8.8% rye 22.8% and 



