NATURAL PRESENCE IN" FIELDS. 
19 
tion, where excessive drought or else scarcity of bugs constituted the 
conditions met with, failed to show presence of Sporotrichum. Two 
counties, on the northeastern border, because of great scarcity of bugs, 
also failed to show signs of fungus. A few counties situated among 
others in which Sporotrichum was observed probably contained it, 
but, as they were not visited, no direct evidence was obtained. 
Granting its absence in such localities in 1910, however, it would be 
but a short time, owing to migration of the chinch bugs, before 
