63 
are abundant and massed together in great numbers, and during a 
period of wet weather. I have succeeded in getting the fungus estab- 
lished at two widely located points in Indiana, and do not consider it 
at all difficult to introduce in localities where Chinch Bugs are abun- 
dant, provided the weather is favorable. But if it is ever utilized by 
the farmer, which seems to me to be at present a matter of considerable 
doubt, it will only be after the pest has become very abundant, during the 
time between the first larvaland adult stages and in a wet time. After 
the Hntomophthora has been introduced into a certain field it will be- 
come diffused only in proportion as the bugs travel about and healthy 
bugs come in contact with spores from those which have died from the 
disease. This will not be very great until the pupal stage is reached. 
The larve of Chinch Bugs seem to in some way understand that while 
moulting they will be well nigh helpless, and hence hide themselves away 
in vast numbers in secluded places. Under such conditions the spores 
thrown from diseased bugs would reach a larger number of their fellows, 
I havefound adults but recently moulted affected by the Entomophthora. 
After the bugs acquire wings and scatter themselves over the country, 
the liability to contagion will be again reduced, unless in case of very 
severe invasions, where from force of numbers congregating on or about 
food plants becomes a necessity. Hence, the introduction of the fungus 
among larvee will at first proceed but slowly, and only in extreme cases 
and under favorable conditions can it be expected to proceed much more 
rapidly among adult bugs. In short, the only way that this fungoid 
disease seems capable of being employed in agriculture is by the estab- 
lishment of some central propagating station to which farmers can apply 
and receive an abundant supply of infested bugs on short notice. By 
this means they could take advantage of a rainy period of a week or 
ten days, and, if they can contrive by sowing plats of millet and Hun- 
garian to mass the bugs in certain localities about their fields, they 
might accomplish something towards warding off an invasion. But 
the possibility of overcoming an invasion after it is fully under way, 
as is almost sure to be the case during a dry season, it must be con- 
fessed is not very encouraging. My failure afterrepeated experiments 
to produce this Hntomophthora in the vicinity of Lafayette without the 
importation of germs is decidedly against the theory that might be ad- 
vanced that the northeastern portion of the State was kept free of 
destructive invasions by reason of this disease brought about by wet 
weather. There is as yet no reason to believe that the disease has 
ever existed in that section of the State. 
Before leaving the subject it will be proper to state that in my exper- 
iments a larva of Chrysopa was introduced by accident and passed 
through the larval stage, feeding continually on bugs dying from the 
effects of the fungus. 
After harvest the Chinch Bugs, as usual, transferred their attention 
to various grasses which were growing up among the stubble, more 
especially Setaria and Panicum, but as these succumbed to their contin- 
