128 
Fresh food introduced. July 31, about fifty bugs dead with Sporo- 
trichum. Many insects with Aspergillus also. Moderate number 
of mites on dead chinch-bugs and decayed vegetable matter. An- 
guillulids present on dead bugs and dead coccinellid. Fresh food 
supplied—about one half the quantity heretofore used. 
August 3, final overhauling and cleaning up. Bugs dead with 
Sporotrichum estimated at about two thousand; many of them 
pupae, mainly on the surface of the dirt. Most of the hidden 
ones were under clods and loose lumps of earth. Quite a num¬ 
ber of chinch-bugs were found dead in copulation, in most cases 
both sexes being infected with the white fungus. Occasionally, 
however, only one of a pair was dead or visibly diseased, the 
other being still alive, but unable to free itself. Two instances 
were noted where one of each pair was dead and covered with 
Aspergillus, while the other showed no growth of any kind. 
Mites still present, but considerably less numerous than before. 
Live chinch-bugs were not abundant, those remaining being mostly 
adults, with very few pupse, young of the first and second moult, 
and numbers of eggs. Box discontinued. 
No. 70. June 23, a third box, similar to Nos. 63 and 69, was 
stocked with food and large numbers of chinch-bugs received from 
correspondents, but not infected. June 27, thoroughly overhauled; 
earth supplied; new food and more live bugs introduced. In¬ 
fected with fungus covered bugs from experiments 68 and 69. 
June 28, food renewed and more live bugs added. June 29 and 
30, fresh food introduced. 
July 1, mold on surface of earth, box in very bad condition. 
Aspergillus present on several dead bugs. Comparatively little 
Sporotrichum. Box thoroughly cleaned aud disinfected; earth re¬ 
newed, fresh food added, and live insects introduced. July 2, no 
fungus seen. July 3, in good condition, but no Sporotrichum seen 
Fresh food and more bugs introduced. July 4, in fair condition. 
A few insects with fresh fungus growth on their bodies. Food 
changed. July 5, condition about as yesterday, except that au- 
guillulids were noticed quite abundant in earth. Food changed 
and more live insects added. J uly 6, white fungus more abundant 
than in experiment 69. Mold on dirt still spreading. Fresh 
food and more bugs added. July 8, a few chinch-bugs dead with 
white fungus removed. Earth stirred to destroy mold. Box in 
fair condition. A second infection introduced. Two cicadas from 
same source as those used in Nos. 68 and 69, were broken up and 
distributed over the surface of the dirt, along the middle of the 
box, and a quantity of cultivated material from No. 2 was dis¬ 
tributed around the sides. July 10, a few fungus-covered bugs 
removed. Dirt contains much mold. Aspergillus less abundant 
than previously. Box cleaned up and fresh food introduced. 
July 11, very little fungus seen. Fresh food added. July 12, 
little Sporotrichum present. Anguillulids seen in dirt. Many bugs 
dying, but without developing Sporotrichum. Fresh food intro¬ 
duced. July 13, about same condition as yesterday. July 14, 
Sporotrichum scant, but more abundant than in Nos. 68 and 
