335 
that in the 92 fields found to "be infested by this insect, the 
average infestation was 37. k percent. The highest infestation found 
in any one field was 72 percent. As reported last year, the outbreak 
is most intense in first- and second-tier counties bordering Pennsyl- 
vania about one-third of the distance across the State from the north- 
ern border. Rye is much less seriously damaged than wheat. 
WHEAT STEM MAGGOT ( Meromyza americana Fitch) 
Iowa. C. J. Drake (August 23)': The wheat stem maggot has done consider- 
able damage throughout the southern half of the State. 
CORN 
CHINCH BUG ( Blissus leucopterus Say) 
Indiana. A. C. Cole, Jr. (August 21): Moderate numbers of first-brood 
adults are now generally dispersed through the cornfields in Tippe- 
canoe County on foxtail grass and corn. They are gradually going to 
corn as the foxtail in small-grain stubble and corn becomes less sat- 
isfactory for food. Egg ;laying is dropping off and dissections in- 
dicate storage of fat rather than development of eggs in first-brood 
females j apparently in preparation for hibernation. First-instar to 
fourth- instar second-brood nymphs are now present in moderate numbers 
on foxtail and corn. 
Illinois. W. P. Flint (August 22): During the past month heavy rains 
have continued over most of the area seriously infested with chinch 
bugs earlier in the spring. The infestation has been reduced to a 
point where very little damage will occur anywhere in the State. Con- 
tinued rains will also probably reduce the second brood thereby greet ly 
lessening the threat of damage next year. 
Iowa. C. J. Drake (August 23): Weather conditions have been very favor- 
able for the second generation of bugs, and heavy populations occur 
in 30 counties in the eastern part of the State. The heavy growth of 
foxtail and other summer grasses has provided plenty of succulent food. 
Unless weather conditions greatly change the situation the population 
in Iowa in 193 ^ill be much heavier than it was 2 years 
ago. 
Missouri. L. Haseman (August 2^1): The month of August has been favorable 
for chinch bug development, but few complaints have been received. 
Kansas. H. R. Bryson (August 23): Chinch bugs are not quite so scarce as 
last year. 
CORN LEAF APHID (Aphis maidis Fitch) 
Connecticut. N. Turner (August 21): Corn leaf aphid abundant but appar- 
ently causing little damage at Mt. Carmel. 
