ILLUSTRATIONS. 
PLATES. 
Page. 
Plate I. Sterile jars filled with soil and chinch bugs, showing diseased bugs 
resulting from a spontaneous outbreak in the jar 16 
II. Fig. 1. — Chinch bug enveloped in growth of the white fungus (Sporo- 
trichum globuliferum) . Figs. 2-7. — Dead chinch bugs, showing 
various degrees of envelopment in the white fungus. 16 
III. Various insects killed by the fungus diseases Isaria sp. and Sporotri- 
chum globuliferum 20 
IV. Various insects killed by the chinch-bug fungus, Sporotrichum globu- 
liferum 20 
V. Fig. 1. — Patch of corn protected by the oiled-straw barrier. Fig. 
2. — Cornfield showing corn treated with crude oil 52 
TEXT FIGURES. 
Fig. 1. Map of Kansas, showing the number of packages of diseased chinch bugs 
sent out in 1910 by the University of Kansas to the different counties 
in the infested area 1 15 
2. Map of Kansas, showing all the localities where Sporotrichum was found 
as a natural infection 19 
3. Diagram illustrating the construction of the dust barrier 48 
4. Diagram illustrating the oiled-ridge type of barrier 50 
6 
I LJLJLJlM l lfVH «-!.-.». 
