41 
Experiment 7, 
August 20, 10:45 a. m. Dusted the 17 living uearly-grown worms of experiment 1 
with full strength pyrethrum, and placed them in a closed mailing box without food. 
Record — 11a.m., some are beginning to be restless; 12:30 p. m., all are quiet; 
1:45 p. m., one almost dead, others jump when touched ; 4:20, p. m., one dead, others 
as before. 
August 21, 11:30 a. m. Somehave become quite active again, and as a result 4 were 
bitten, 3 are dead, 6 others alive and active, while the rest were probably eaten. 
The active ones were placed in a breeding cage, and provided with branches of cot- 
ton having leaves and bolls. Some died later and a few matured. 
Experiment 8. 
August 30, 4:30 p. m. Eighteen of the living worms from experiments 4, 5, and 6 were 
well dusted with lime. Nine were placed in each of two closed mailing boxes. This 
^experiment was for the purpose of having a check on any possible effect of the air- 
slacked lime on the worms. 
August 21, 11:45 a. m. In one box two were injured and died. The rest alive and 
active. In the other box all are well and active. Both lots were then placed on 
branches of cotton in breeding cages. All began feeding ; a few died later, but most 
of them matured. 
Experiment 9. 
September 11. Boll Worm in a boll with posterior segments protruding. Dusted 
this with full strength pyrethrum at 9:15 a. m. ; no immediate effect was noticeable; 
11:30 a. m. ; worm has turned round ; head almost protruding ; not feeding ; 3 a. in., 
bas turned round now to position same as when dusted, and is feeding. With a 
pair of forceps placed some pyrethrum powder on the body of the worm in the hole. 
Did not effect the worm noticeably for five to ten minutes. 
September 12, 8:30 a. m. Has left the boll and is in the upper corner of the cage 
still alive and active. 
September 13, 8 a. m. Has returned to the boll it had left, and is feeding. Dusted 
the protruding portion with pyrethrum. In the afternoon the worm was found 
crawling about in the cage, but appeared to be full grown and searching for a place 
to pupate. Placed back on the branch again. 
September 14. Worm still on the boll and is active, but not feeding: Particles of 
pyrethrum are found adhering to the body. The anus is swollen and inflamed, pro- 
ducing a watery exudate. This may be due to the effect of the pyrethrum, for this is 
the portion of the body which was usually protruding from the hole in the boll and 
received most of the dusting. The worm was placed in a partially opened form. 
September 15. Has eaten the form almost entirely. ' 
September 16. Crawling about in cage. Placed on a branch. 
September 17. Crawling about in cage. Has shortened some and is preparing to 
pupate. Placed in a tin can with earth to allow it to do so. Pupated September 21. 
Pupa still alive October 3, when it was placed in alcohol as a specimen. 
In one instance, when a worm had been experimented with in a similar way to Ex- 
periment 9, the worm went down to corner of the cage (which was a newly made one),' 
webbed together the loose sawdust found there, and pupated in the cell thus formed. 
Experiment 10. 
September 20, 5:30 p. m. Marked five bolls in which Boll Worms were feeding and 
a, portion of the body protruding. At 5:40 dusted profusely with pyrethrum, full 
strength. 
