32 Contagious Diseases of the Chinch-bug. 
weeds, etc. After diligent search, only a few bugs could be 
found covered up in the mud. ! 
June 19. Bugs in corn, and very active. Only a few Sporo- 
trichum bugs could be found. These were most abundant in 
plot 4 where the weeds were large and made the soil moist and 
shady. Bugs still moulting. 
June 20. Only alittle more Sporotrichum than yesterday ; 
Bugs beginning to scatter. 
June 21. Bugs moulting and scattering. Very hot. 
June 22. Could see no change from yesterday. Very hot. 
June 24. Bugs still scattering all through the field. 
June 26. A few bugs flying, but not many. Hot. 
June 28. Cooler. 
June 29. Rained all day. 
June 30. Misty and rainy. 
July 1. Large number of Sporotrichum bugs could be found 
in the field. Ground moist but not muddy. Bugs have scat- 
tered all over the fleld. 
July 8. Sporotrichum very abundant. 
July 5. Heavy rain on the 4th. 
July 8. Plenty of Sporotrichum and some Empusa could be 
found in all parts of the field, especially where it was weedy. 
July 24. Bugs still in the corn, some little red larve. 
Sporotrichum quite abundant. After the wheat had been cut 
in fields A and B, the stubble was turned under and millet was 
sown in the south half of A and corn was planted in the north 
half. Corn was also planted in B. After these had made a 
fair growth the bugs invaded them from field C. On the Ist of 
August the bugs, including many red larve, were plentiful ,in 
these fields. Sporotrichum was also abundant. 
August 5. With a large sprayer, 45 gallons of Sporotrichum 
spores in water, from artificial cultures, were sprayed over the 
young corn of field A. 
August 19. Apparently the beginning of an Empusa epi- 
demic in millet of field A. August 17 and 18 were warm, 
sunny days, but some very wet weather had preceded. Some 
Empusa bugs were found in this field August 16. Some red 
bugs were placed in a test tube on the afternoon of August 19. 
August 20, one bug found covered with Empusa. No signs of 
