48 PAPERS ON CEREAL, AND FORAGE INSECTS. 
From this table it is seen that while the check cages gave but 1.45 
per cent developing the fungus, this percentage was raised to 14.28 
when the bugs were artificially inoculated. 
Some live and apparently healthy bugs were then killed mechan- 
ically by piercing them with a sharp needle, their bodies then bemg 
inoculated with the fungus and placed on moist blotting paper. 
Inoculation experiments with bugs killed mechanically. 
)_———_——<oq @ _—_—___—__<<____— 
| 


Artificially inoculated. 
Per cent 
Number Ftc ar which 
bugs used. | “fun be §| developed 
pus: fungus. 
25 4 16 
35 3 8.57 
25 3 12 
85 10 ils 
Checx 
50 | 0 | 0 
Others were killed with fumes of chloroform, allowed to dry over- 
night, then washed in distilled water, and treated as in the preceding 
experiment. 
Inoculation experiments with bugs killed with fumes of chloroform. 
Artificially inoculated. 





| Per cent 
Number ques which 
bugs used. | “fin a 8 | developed 
Bus. fungus. 
| 
20 6 30 
25 5 | 20 
20 6 | 30 
65 17 26.15 | 
2 Sao cup aol 
Check 
200 0 | 0 

From these experiments with dead bugs it was found that a small 
percentage of them could be miade to produce S porotrichum globuliferum 
after inoculation, with every indication that the fungus made its en- 
tire growth on their dead bodies. 
EXPERIMENTS WITH LIVE CHINCH BUGS.—The cages used in these 
experiments consisted of a series of small flowerpots containing grow- 
ing wheat, over each of which was placed a glass cylinder. Into 
