44 PAPEES ON CEKEAL AND FORAGE INSECTS. 



Particles of the fungus were found on dead adult bugs or a part 

 of their bodies — some masses of white fungus covering only a broken 

 abdomen, or a thorax with wing attached, by which the insect was 

 identified. It appears that the fungus had developed rapidly on 

 fragments of bugs and entire bodies of the bugs, especially when 

 buried beneath the soil. The indications here were that much white 

 fungus had made its entire growth on the dead bodies of the hiber- 

 nating adults which had migrated to the wheat fields. 



During the last week of July the weather was hot and dry and 

 myriads of young bugs of the second generation, now feeding, sought 

 shade under blades of corn, or beneath the clods at the base of the 

 plant, but during this time no fungus developed. This condition 

 prevailed until the middle of August, when wet weather again set 

 in, and while this did not seem to increase the amount of Sporotri- 

 chum present, plenty of the fungus could be found in the soil around 

 wheat stubble. However, this fungus seemed unable to infect the 

 young bugs in the corn above ground, even where the cornfield 

 joined the wheat stubble. 



Sumner County, Kans., seemed to be about the center of the 

 Kansas-Oklahoma chinch-bug infestation. With a view of finding 

 out whether or not the fungus Sporotrichum was present in other 

 places over the infested area, as well as to determine the extent of 

 the infestation, a trip was made during June of 1910 through central 

 and southern Kansas and central and northern Oklahoma, which 

 represents pretty well the area infested during 1910 in this part of 

 the Southwest. Twenty localities were visited, viz: Herrington, 1 

 McPherson, Hutchinson, Pratt,* Dodge City,* Great Bend,* Sedg- 

 wick, Wichita, Winfield, Arkansas City, South Haven, Caldwell, and 

 Caney, Kans. ; Medford, Enid, Kingfisher, Elreno,* Chickasha,* 

 Oklahoma City,* and Tulsa,* Okla. Sporotrichum globuliferum 

 was found in every locality except those marked with an asterisk. 

 The fungus covered bodies of the dead bugs were usually found lying 

 upon the surface of the ground in wheat fields and in every case 

 these were old migrant bugs, precisely as found in Sumner County, 

 Kans. The seven localities where no Sporotrichum was found were 

 all on the extreme outer edge of the infested area where there were 

 very few bugs present. In every one of these seven localities the 

 soil was very sandy, apparently not retaining moisture necessary 

 for the development of the fungus. 



Artificial introduction. — The fungus Sporotrichum globuliferum 

 was already so abundant among the bugs in Sumner County during 

 the summer of 1910 that no attempt was made upon the part of the 

 authors to introduce it artificially. It seemed useless, since the 

 amount already present so far exceeded any amount which could bo 

 introduced. However, a number of farmers anxious to try this 



