106 
No. 19. July 28. Ad infection experiment precisely like the 
last, except that the spores were placed along the right side of 
the caterpillar only. Two days later the fungous growth was abun¬ 
dant all along this side wherever the spores had lodged, but it 
had not yet begun to spread. A very fine white web bad fastened 
the ‘larva to the dish upon which it was resting when it died. 
July 31 nearly the entire body was covered by the mycelium of 
Sporotrichum, leaving only the two ends free, and the larva had 
begun to change to the crushed-raspberry color. August 2 the 
whole body was covered, and later the spores developed every¬ 
where, as before. 
No. 20. July 28. Like the preceding, except that the spores 
were applied only at the posterior end of the back. July 30, 
growth abundant at the point of infection, covering about a fourth 
of the back, but not extending downwards to the sides. A very 
fine white web fastens the larva to the cover. July 31, growth of 
mycelium very abundant at point of infection, and extending 
downwards, underneath the body, to the hinder end, the crushed- 
raspberry color appearing wherever the fungus has taken hold. 
August 1, growth slowly extending downwards. August 7, spores 
well developed on the dead larva. 
Experiments 15, 16, 18, 19, and 20 of the foregoing series show 
the efficiency of this fungus as a means of infecting living cab¬ 
bage worms, and bring to light also the interesting fact that its 
growth may have the effect to color the larva red. 
We have next a series of experiments intended to test the pos¬ 
sibility of the growth of Sporotrichum on insects dead when 
infected. For this purpose, cabbage worms killed with chloroform 
were used. 
No. 21. July 30, 1:30 p. m. Chloroformed cabbage worms 
placed in covered glass dish on piece of cabbage leaf on moist 
sand, and spores of muscardine (Sporotrichum) from No. 11 sown 
along the back. July 31, 8:30 a. m., no growth visible. August 
1, 9 a. m.. slight growth along the back. August 2, 8:30 a. m., 
growth very abundant on the back. August 7, 3 p. m., Sporo¬ 
trichum well developed on this larva. Specimen preserved. 
No. 22. July 30. This was an experiment like No. 21, except 
that the cabbage worm was infected on the ventral surface. J uly 
31, growth not started. August 1, beginning to grow. August 2, 
growth very abundant and spreading over the entire body. August 
7, Sporotrichum well developed. Specimen preserved. 
No. 23. July 30. Same as the foregoing, but infected along the 
side. Examined August 1, 2, 3, and 7, with results exactly as above. 
No. 24. July 30. Exactly as above, except that several cater¬ 
pillars were infected on the head. July 31, growth not started. 
August 1, no growth as yet, except that a fine cobweg fungus has 
started on a single worm. August 2, the above worm completely 
enveloped in the cobweb growth. August 3, heads of spores just 
beginning to show. At this point the above experiment was acci¬ 
dentally interrupted. 
