123 
100°. Both fields critically examined by Mr. Bartley, but no dead 
bugs seen and only an occasional trace of the original material 
found. Examined again on the 17th, immediately after a slight 
shower. No fungus found. Corn in bad condition; ears shriveled 
and shrunken. The high temperature continued, the noonday av¬ 
erage from the T2th to the 17th, inclusive, being 92°, and that 
for the month being 93°. Light rains on the 23d and 24th. Live 
bugs on the increase; much corn fallen down. No dead bugs, and 
no indication that fungus had spread. September 4, very heavy 
rain, followed by high temperature. Fields very carefully examined 
by Mr. Johnson. Very muddy, and much corn flat on the ground. 
In such places, especially, the bugs literally covered every stalk. 
Few adults seen, the great majority being of the first or second 
moult or pupae. Only three bugs dead with this fungus found 
after a long-continued search, and these under fallen corn, on the 
ground, a considerable distance from the place where the infection 
material was placed. Only an occasional stalk of the hills originally 
treated remained erect, the rest being dead and flat on the ground. 
No. 66. Conditions being now especially favorable to success, 
several hundred spore covered bugs from No. 68 were distributed 
in this field on the Bartley farm by Mr. Johnson September 4, 
behind leaf sheaths, and on the ground under the fallen stalks of 
twenty-three hills which were black with bugs. The location, 
which was about twenty-five rods from that of experiment 65, was 
marked as before. September 7, no indication that the disease is 
spreading; a few. traces of the original material present. Bugs 
everywhere abundant, and seemingly healthy. September 10, 
ground still damp, and corn covered with bugs, but none dead 
with fungus. September 18, similar report. 
No. 67. September 7. A second lot of cultivated fungus in¬ 
troduced on this date, material from No. 2 having been sent to 
Mr. Bartley, who placed it, according to directions, in a one-acre 
strip of late corn near his house, about eighty rods from the 
other experimental fields The chinch-bugs had accumulated in 
great numbers in this late-planted patch. Seventeen hills of the 
seventh row, in the southwest corner, were thoroughly treated, as 
in No. 66. The ground was quite damp, and September 12 a 
heavy rain fell, followed by extremely hot weather. No dead bugs 
seen at this last date, but traces of infection material present 
behind leaf sheaths and on the ground among the bugs. Sep¬ 
tember 16, light rain; corn beginning to wilt from chincli-bug 
attack; not a single dead insect seen; a little culture material still 
present. 
September 18, Mr. Johnson carefully examined the Bartley farm, 
and found only a single fungus-covered insect in the last-mentioned 
field. No traces of the cultivated material. Corn about all dead, 
a large proportion of it being flat on the ground. Corn in ad¬ 
joining fields all dead in the immediate vicinity of the places 
where infection experiments were made, and only six bugs dead 
with the fungus found after long-continued search. The drooping 
tassels, and the dirty brown, ragged leaves hanging close to the 
