75 
June 27 one bug was dead and covered with Sporotricium; other¬ 
wise all remained without loss. It is quite likely that this insect 
became infected from the neighboring experiments. 
No. 34. May 10. A farmer’s contagion box started by Mr. 
Marten, on the farm of Mr. John T. Finley, near Tilden, Illinois. 
The box was prepared according to the Kansas method, stocked 
with about two hundred live chinch-bugs collected on the Finley 
farm, and infected with culture material from Nos. 26 and 27. 
June 15, examined by Mr. Marten and found in good condition; a 
few bugs dead with Sporotrichum. Mr. Finley had not distributed 
any of this material in his fields on account of the scarcity of 
chinch-bugs. The box was examined a second time by Mr. Marten 
August 11, and found in good condition. Several dead bugs cov¬ 
ered with Sporotrichum were seen but no diseased bugs were dis¬ 
tributed. 
No. 35. May 11. A farmer’s contagion box, like No. 34, in¬ 
fected from Nos. 26 and 27. Started by Mr. Marten on farm of 
Mr. Charles Ferguson, near Odin, Illinois. Owing to a scarcity 
of chinch-bugs on this farm no use was made of these infected 
specimens. 
No. 36. June 6. An infection experiment upon Cecropia moths. 
Twenty-four moths reared from cocoons were treated with Sporo¬ 
trichum from cultures 26 and 27 by rubbing the spores along the 
spiracles, and were then placed on moist earth in a breeding-cage. 
June 8 several more moths were dusted with spores from the 
same source and placed in the cage. Several of the lot first intro¬ 
duced were dead, but showed no trace of Sporotrichum. A Tachina 
fly had emerged from one. The fungus was seen on the tarsi of 
a few specimens on the 18th, and several moths examined June 
22 had the abdomen filled with a fungus mycelium. Sporotrichum 
had appeared externally on more of these dead moths by June 30. 
In the meantime Cecropia larvae had hatched from eggs laid in 
the breeding-cage, and July 5 these also began to die, Sporotrichum 
appearing on their bodies July 8. and ripening by July 11. These 
larvae were fed with box-elder leaves. 
No. 37. June 20. An infection experiment upon Ischnodemus 
faliens precisely similar to No. 33, except that the fungus spores 
came from cultures 26 and 27. The insects all died by July 8, 
and about one tenth of them were covered with Sporotrichum. Two 
other insects (a Euschistus and a long-horn beetle) accidentally 
enclosed in the cage were also dead and imbedded in the fungus. 
Check the same as that for No. 33. 
Ino. 38. June 20. An unsuccessful infection experiment upon 
a lot of Diptera collected from flowers, placed on moist sand, 
treated with spores from Nos. 26 and 27, and covered with a glass 
cylinder which was closed- at the top with gauze. The insects were 
all dead and partly decayed by July 8, but with no traces of 
Sporotrichum. 
Iso. 39. June 21. An unsuccessful infection experiment upon 
lschnodemns falicus dusted with sports from Nos. 26 and 27. 
