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Fifth Annual Report. 19 
Experiment 3. April 24 nine pots were started. 
(a) Three checks. 
(b) Three sprayed with artificial culture. 
(c) Three treated with a parasitic fungus found on other in- 
sects. 
The bugs died slowly in a and ¢ but about twice as rapidly 
in b. 
Experiment 4. May 2, mixed bugs from various sources were 
put into nine pots. 
(a) Three checks. 
(b) Three sprayed with artificial culture of Sporotrichum. 
(c) Three inoculated with Sporotrichum on chinch-bugs. 
The bugs remained alive in a, but died in b and ¢ of Sporo- 
trichum. The bugs were left in a until all died, but none de- 
veloped Sporotrichum. 
Experiment 5. May 9, started nine pots. 
(my Pbiree checks. 
(6) Three sprayed with artificial culture. 
(c) Three with Sporotrichum on chinch-bugs. 
The bugs died in all the pots, and developed Sporotrichum. 
Experiment 6. May 10, started nine pots. 
(a) Three checks. 
(b) Three sprayed with artificial culture. 
(c) Three sprayed with Sporotrichum on chinch-bugs. 
The pots were opened May 30, 20 days after inoculation. 
The bugs were dead in all the pots. In pots ano Sporotrichum 
was present; in pots ) and ¢ Sporotrichum was abundant. 
Experiment 7. May 16, started six pots. 
(a) Three checks. 
(b) Three sprayed with artificial culture. 
Sporotrichum developed in both a and b. 
Experiment 8. May 16, started four pots with bugs from Ax- 
tell, Kas. 
(a) Two checks. 
(b) Two sprayed with artificial cultures of Sporotrichum. 
Sporotrichum developed in a and b alike. 
Experiment 9. May 21, started four pots. 
(a) Two checks. 
(b) Two sprayed with artificial cultures of Sporotrichum. 
Sporotrichum developed in a and b alike. 
