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the infection of these fields on the morning of Saturday, June 23. In 
field A the infection was put in the axils of the leaves and at the bases 
of the stalks of every hill of rows 4 and 5, and 7 and 9. In field B the 
same was done for rows 2 and 3. 
Search was made before distributing the infection for possible Sporo- 
trichum bugs, already spontaneously in the field, but none were found. 
Previously to June 23 there had been frequent rains, so that the 
ground was moist at this time. On the night of June 23, heavy 
rain fell, and again on the afternoon and night of June 24. The after- 
noon rain was accompanied with heavy hail. Some of the stones- were 
an inch in diameter. The night rain of the 24th was driven by a strong- 
west wind, so that the corn was laid flat in places. The field was 
visited on the afternoon of the 25th and the bugs were found in as good 
condition and as numerous as when first noticed on the 23d. It was 
the intention to scatter more infection on the 25th, but a rain storm 
came and further infecting was deferred. On the morning of June 26 
a bucket of soil was taken from the infection box and scattered in each 
hill of rows 9 and 10 and row 15 of field A. At this time the bugs 
appeared in good condition, and no signs of the spread of the infection 
were apparent. The bugs had advanced somewhat into field C, and 
infection was scattered down row 15 of this field for the few rods the 
bugs extended, and also in different places in row 15. The morning of 
June 26 was warm and clear. 
On the morning of June 28 a bucket of earth from the infection box 
was scattered at every alternate hill through row 18 of field A, and at 
intervals of every two or three hills through rows 1 and 2. Only a few 
Sporo bugs could be found. The bugs were working in great force. 
Under clocls and fallen stalks and leaves large numbers of the bugs 
were gathered for molting. Most of the bugs on the standing corn 
were black larvae and pupa?, but there were a few red larva? and a few 
old winged and newly-molted winged individuals. The morning clear 
and warm. A slight shower on the night of the 27th. Earth moist in 
the field. 
July 2 : Bugs from the infection boxes sufficient to infect each hill 
for two rows were scattered in field A where the bugs were thickest 
out to the fifty-second row, the bugs having extended to that distance. 
A few white fungous bugs could be found at nearly every hill. The bugs 
were apparently not more than half as numerous as when the field was 
first infected, but they had scattered as far as the fifty-second row, and 
this may account for the apparent decrease. Bugs are continually 
hatching and molting at this time. 
July 5: There was a heavy rain on the morning of the 4th. Bugs 
covered with Sporotrichum can be found in great quantity under fallen 
cornstalks and clods. One and one-half gross of pill boxes were filled 
from the field today. The victims are chiefly old bugs, but not all. 
