122 
June 25 and 26, heavy rains and high temperature (average ob¬ 
servation, 88°). No dead seen. On the other hand, the chinch- 
bug injury was increasing rapidly, and some wheat was wilting, 
with shriveled heads. June 27, temperature 100 ; wheat cut on 
28th and 29th; dry and very hot, average midday temperature 99 . 
Examination by Mr. Marten June 29. Several fungus-covered 
insects found in drill rows where material was placed, and a few 
others a short distance away, but as a rule their whitened bodies 
were no more numerous than before the infection was distributed. 
Myriads of living bugs in the stubble, but a general movement 
toward adjoining corn on one side and toward timothy on the 
other. June 30, a shower; temperature 98\ The average midday 
maximum for the whole month was 94°. July 1 to 10, very warm 
and dry, average midday temperature 83 J°. 
Field examined again by Mr. Marten July 10. "Wheat stubble 
very dry, yet containing many live bugs. The great majority, 
however, have gone into an adjacent corn field. No dead found in 
stubble, grass, or corn. The remainder of July hot and dry. 
Good rain the 18th, and slight shower the 19th. No dead found 
showing any traces of disease. Corn literally covered in many 
places. Light rain on 2:1th and 29th. No dead observed. Very 
warm on 30th and 31st, average temperature record 92 . Average 
midday reading for month 88". First three days of August very 
warm, with light rain the 3d, followed by a week of extremely 
hot weather. No dead seen. 
Nos. 64 and 65. August 6, a second infection experiment was 
begun by Messrs. Marten and Johnson in two of Mr. Bartley’s 
fields with material derived from two different sources. The first 
was about three inches square of a culture on corn meal saturat¬ 
ed with beef broth from No. 2 (second remove from larva found 
April 17), and the second consisted of several hundred chinch- 
bugs dead with Sporotrichum from No. 68. The corn was badly 
dwarfed in both fields and literally alive with chinch-bugs. Ground 
damp, temperature 88 . No trace of the disease detected at this 
time in these fields or anywhere in the neighborhood. 
The cultivated fungus (No. 64) was placed in corn about fifty 
rods from the spot where the first infection (No. 63) had been in¬ 
troduced into wheat. A row along a dead furrow was chosen, 
where the corn was stunted and literally covered with chinch-bugs. 
The culture material was cut into small fragments and dropped 
into the midst of the bugs behind every sheath of twenty-nine 
hills, the position being carefully marked by cutting away the 
tassels from the hills at either end. 
The infected bugs (No. 65) were distributed in an adjoining 
corn field thirty-nine rods from the wheat and fifty rods from the 
preceding distribution (No. 63). Condition of corn about the same 
as in the foregoing (No. 64). Fourteen hills on the south end of 
the thirteenth row, counting from the west side, were treated and 
marked as above. 
The weather continued dry and hot for the next four days, the 
average midday temperature being 97^°. August 11, heavy rain, 
accompanied by extremely hot weather, the thermometer registering 
