40 
Infection Experiments :— 
Nos. 11 and 12, Jane 20. Infection from agar culture No. 10. 
No. 29, June 29. Infection from corn-meal culture No. 15. 
No. 30, July 6. Infection from various cultures (Nos. 15, 32 and 54). 
No. 46, July 9. Infection from middlings culture No. 41. 
Nop. 57 and 59, June 5 and 8. Infection from agar culture No. 13. 
No. 70, July 13. Infection from corn meal culture No. 68 and 
middlings culture No. 72. 
No. 86, June 8. Infection derived from dead chinch-buge. 
Infection Experiments with Cabbaqe Worms :— 
No. 33, J une 29. Infection from corn-meal culture No. 32. 
No. 36, July 28. Iufestion from various cultures on corn-meal 
and middlings (Nos. 32, 41, 50, and 72). 
No. 69, July 8. Infection from corn-meal and bran cultures (Nos. 
63 and 77). J 
Miscellaneous Infection Experiments :— 
No. 5, May 11. With June beetles. 
No. 37, July 28. With fall web -worms. 
No. 38, August 24. With fall web-worms. 
No. 42, June 30. With tomato worm. 
Nos. 48 and 55, July 7 and 27. With Hemaris larva?. 
No. 49, August 29. With grasshoppers, etc. 
No. 51, July 27. With Datana larvae. I 
No. 66, May 25. With plant-lice. 
No. 58, June 6. With the grain aphis. 
Nos. 62 and 63, July 16 and 18. With plant-lice. I 
Nos. 64 and 65, May 22. With miscellaneous insects. 
No. 67, June 1. With Cecropia moths. 
No. 73, June 19. With potato beetles. j 
No. 74, June 19. With crickets. 
DETAILED DESCRIPTION OF EXPERIMENTS. 
No. 1. April 27, 1891. A lot of chinch-bugs collected (April 
8 to 11) at Carlyle, Marissa, and other places in Southwestern 
Illinois, isolated in a bottle with green wheat for food for the 
purpose of ascertaining whether fungous disease was present 
among them. May 4, no external appearance of disease. Three 
bugs examined microscopically by crushing and dissection. No 
internal evidence of fungus. 
No. 2. May 11. Contagion experiment with chinch-bugs con¬ 
fined with specimens of Disonycha pennsylvanicci dead with the 
Sporotrichum disease.* About fifty chinch-bugs placed on earth 
* See Seventeenth Report, State Entomologist of Illinois, p. $‘.2. 
