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the fungus in the wheat stubble or in corn adjoining. The disease 
practically disappeared on this place during the very dry weather 
of the latter part of June, the whole of July, and a part of 
August, and appeared again, in corn, late in September, when it 
was also generally present throughout this region. Mr. Johnson 
found seveial chinch-bugs dead with this fungus in an adjoining 
com field on this farm September 18 and 28, but no traces were 
detected in the wheat stubble adjoining. 
No. 61. June 15. A field infection experiment started by Mr. 
Marten in spring wheat on the University farm (see B. Plate II). 
A quantity of dead and fungus-bearing bugs, together with a few ' 
live ones, all from contagion box No. 54, were scattered on the 
surface of the ground at the bases of the wheat plants in the 
second drill row for a distance of several rods, represented at c—a, 
a place where live chinch-bugs were most numerous. Ground 
very dry, no rain having fallen since June 1, and then only .02 of 
an inch. Sky clear, temperature 91° Fah.* June 16, slight rain 
in the afternoon (.23 inch), temperature 82°. June 17, cloudy, 
rain (.2 inch), temperature 82d June 18, cloudy, temperature 
74 . Examined by Mr. Marten. Live bugs were numerous, and 
traces of original material still present, but no indication that 
disease was spreading. June 19, clear and warm, temperature 81 d 
June 20, light rain in afternoon (.1 inch), temperature 87°. June 
21, cloudy, temperature 86°. Examined by Mr. E. B. Forbes. 
Not the slightest indication that the disease was spreading, only 
two adult chinch-bugs being found dead with fungus after a long- 
continued search, and these apparently a part of the original 
stock. Large numbers of young bugs in all stages, with a few 
adults intermingled, feeding freely at the bases of wheat plants, 
but no appearance whatever of the infection among them. June 
22, slight rain (.05 inch) in the afternoon, temperature 88°. 
June 23, cloudy, temperature 90d June 24, 25, and 26, consider¬ 
able rain (1.18 inch), with average temperature 82°. June 27, 
clear, temperature 88°. Examined by Mr. Johnson and myself. 
Plot closely scrutinized throughout its entire length and breadth. 
Bugs very numerous, but none dead with fungus. Insects rapidly 
advancing into adjoining corn (C). This same day all the earth 
from Nos. 68, 69, and 70 was removed, together with several thou¬ 
sand live bugs and many dead ones (about 100 with the fungus 
and others without), and all scattered in the vicinity of the first 
place of distribution. June 28, 29, and 30, clear, with high tem¬ 
perature (average 89°). July 1, light rain in forenoon (.05 inch), 
temperature 83°. July 2, sky clear, temperature 85°. * July 3, 
forenoon clear, afternoon cloudy, temperature 85°. Experiment 
carefully examined by Mr. E. B. Forbes. A few dead fungus- 
covered chinch-bugs found on ground in first drill row, but no 
others at any point in the field. Every wheat plant badly infested 
with bugs of all ages, mostly of the last two moults. The first 
three or four rows of corn adjoining blackened with pupce, or bugs 
of the moult just preceding, with an occasional adult, all feeding. 
* Temperature taken each day at 2 p. m. 
