25, in No. 62. The insects in the checks all died in the mean¬ 
time but no traces of Sporotrichum appeared among them. 
No 61 May 22. Infection experiments on ten caterpillars and 
saw fly larvae (Tenthredinidse), taken by sweeping grass. Treated 
with spores from the Thaxter culture (No. 7), and placed under a 
bell-glass on growing blue-grass and clover. Two saw-fly lanm 
were dead on the 25th, and had a slight mycelial growth on then- 
bodies* two more were dead with this fungus on the 26th; se\eial more 
larvm (lead the following day; and on the 28th still others. 
30 all except two were dead and covered with Sporotrichum, and 
by June 4, these also had perished. Specimens preserved. 
Other saw-fly lame enclosed in a similar cage without treat¬ 
ment remained iu good condition and without loss. 
No. 65. May 22. Infection experiment with larvae of a grass saw- 
fly (Dolerus) taken by sweeping, with spores from the Thaxter culture 
(No. 7), and placed under a bell-jar on growing blue-grass and 
clover May 26, two larvae dead and covered with the fungus, to¬ 
gether with a small fly (Dolichopodidae) enclosed by accident; left 
in the cage to develop spores. May 28, more had died. May 3U, 
all dead and all except three with an external growth ot Sporo¬ 
trichum Other specimens included with the above — an Apatura 
larva and several plant-lice-also dead with external fungous 
growth. Only a single lepidopterous caterpilar alive Cht ck ^ 
eight saw-fly larvae from same place established May 29 and ob¬ 
served until June 9, by which time none had cued, but all had 
PU^No^ 66. May 25. Infection experiment on plant-lice collected 
from clover, treated with spores from the Thaxter agar culture 
(No 7) and placed under a glass cylinder breeding-cage on clover 
plants May 29, lice all alive. June I, lice weak and wandering 
from food plant. June 3, all dead and imbedded m the white 
fungus. Specimens preserved. Check lot kept in similar cageie- 
mained in fair condition, a few lice dead; but there was no fun¬ 
gous growth on their^ bodies, and none appeared later. Experiment 
observed untune ^ f n £ ec ti 0 n experiment with ^Cecropia moths 
treated with spores from the Thaxter tube (No. 7). Eight moths 
were dusted with spores, and placed m a breeding cage contain- 
Lg damp eaitli. By June 3, two had died, and all - were dead by 
the 8th; but no external fungus on their bodies at tins tin . 
Four days later a slight mycelial growth appeared on several, 
which, by the 14th, was clearly Sporotrichum, and on the 18th 
was fruiting abundantly. Specimens preserved.. Se\eial dead 
moths with slight traces of Sporotrichum on their * el ® 
left in the cage. July 11, spores ripe A simllai n n ° 
moths kept under like conditions as a check, were all dead June 
14 but developed no Sporotrichum. . 
No. 68. June 12. Culture experiment on corn-meal batter 
mixed witli beef broth, prepared as in number ,8. i lie mitilent 
material placed in a test-tube and infected with spores from mil- 
ture No. 7. Two days later growth had begun, and it incieased 
