Puate I. 
i. 
TET. 
ILLUSTRATIONS: 
PLATES. 
Sterile jars filled with soil and chinch bugs, showing diseased bugs 
resulting from a spontaneous outbreak in the jar .....--------..--- 
Fig. 1.—Chinch bug enveloped in growth of the white fungus (S‘poro- 
trichum globuliferum). Figs. 2-7.—Dead chinch bugs, showing 
various degrees of envelopment in the white fungus..........-.--. 
Various insects killed by the fungus diseases Jsaria sp. and Sporotri- 
CHT GUO DUNS ETUM ac a cei ores ole ie ie of aie ee oe oe ee eee 
. Various insects killed by the chinch-bug fungus, Sporotrichum globu- 
LifeRUM 3.2 Soca Sots Sac aja ho ca oe Ce Seen ne = eee ee ee ee 
. Fig. 1.—Patch of corn protected by the oiled-straw barrier. Fig. 
2.—Cornfield showing corn treated with crude oil......---------- 
TEXT FIGURES. 
Fia. 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 anfested arent. 3-25 06. Sts oss oes eis steals soho e one comet ee 
2. Map of Kansas, showing all the localities where Sporotrichum was found 
ano natural antections -c.-%--5 54ers eee asso Se es eee ae eee 
3. Diagram illustrating the construction of the dust barrier........------ 
4. Diagram illustrating the oiled-ridge type of barrier.......-..--.------ 
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