REPORT OF PROF. R. W. JONES. 
[23] 
half of the Aletia? had fallen to the gronnd and were in convulsions, the younger worms 
falling first. At the end of one hour there were but four larva) of Aletia on the cotton 
that had been reached by the extract, and these were evidently much affected by it. 
Next morning I found only one Aletia larva alive on these plants. 
I took seven chrysalids of Aletia from these plants that received the spray, and 
slso at the same time took other chrysalids from a part of field not reached by the 
spray. 
Only one of the first lot of chrysalids showed signs of life afterward, and it died in 
the effort to extricate itself from the pupa-covering. The other lot of chrysalids treated 
similarly in ajar produced moths. 
5. On Cabbage Worms. 
(a) Twenty-two worms, some Pionea rimosalis, some Pieris olerdcea. Extract 
p vp-thrum in methyl alcohol. Strength of liquid : 1 part extract to 30 parts of water. 
Every worm killed in a few minutes. 
(b) Twenty worms as above, three green, the others Pionea rimosalis. Extract 
pyrethrum in common alcohol. Strength : 1 of extract to 30 of water. In four min- 
utes worms were all dead but four; three Pionea escaped, and one Pieris. The small 
worms were killed first in both experiments, as I found to be almost invariably the 
case with Aletia and Heliothis. 
G. September 21, on Boll Worms. 
Foliage so dense as to afford the best possible protection. Extract of pyrethrum in 
nut hyl alcohol. Strength: 1 to 32 of water. Three of these worms were three-fourths 
of their lengths in the bolls, the fourth was entirely concealed. I threw a very small 
quantity of the liquid on this cotton; for three or four minutes there was no move- 
ment of the worms, but presently they came forth suddenly from the bolls, began to 
crawl uneasily on the leaves and stems, soon fell to the ground, and in one hour and 
four minutes throe were so nearly dead as to make it certain they would die; one 
crawled off, showing some signs of paralysis. Not having time to wait in order to 
ascertain if it would die, I sprinkled a small quantity of the same liquid on it; then 
its crawling quickly ceased. All these were large larvae. 
7. September28. Extract pyrethrum in methyl alcohol. Strength: 1 part extract 
to 40 of water. Sprayed liquid at 10.45 a. m. on a very largo number of worms (Aletia), 
covering a considerable urea. All the small worms were killed in an hour. Nearly all 
the large larva) fell to the ground, but many of these succeeded in crawling away, and 
some ascended the plants, while others of the same size died in convulsions. 
Mauy other experiments were made by mo, but nothing was developed not included 
in those cited above. 
I have the honor to be, very respectfully, &c, 
R. W. JONES, 
Special Agent, U. S. E. C, Oxford, Miss. 
