56 BULLETIN NO. 1, DIVISION OF ENTOMOLOGY. 
In progress of this experiment I observed something that may be of 
interest. Pup were numerous, and most of them were inclosed in a 
half roll of theleaf,as usual. The liquid, applied generally to the leaves, 
was seen to run down into these nests, and many of the pupz were set 
to wriggling. I then gathered a great many of them, and tried the 
emulsion on them, of various degrees of strength, and applied in dif- 
ferent ways: First, of this strength (30 to 1), thoroughly wet by hand 
or dipping them in the liquid; all died; stronger solutions the same; 
weaker not tried. Secondly, adozen, gathered with the stalks, so as to 
leave them hanging, as in the patch, in a cluster, were sprinkled, as in 
the field, and then caged. Within a week two flies came out. The 
cases whence they issued were found not saturated with the oil. All 
the others exhibited traces of oil, and, though perfectly dead, showed 
no other signs of disease or parasites, and very little progress towards 
putrescence. 
I thought these two last experiments worth reporting, as they may 
have a bearing upon the destruction of chrysalids of other genera. 
But my conclusion I think it also proper to state. Although much of 
it may be considered deduction from imperfect experiment, I do not 
perceive any hope of kerosene competing with the arsenious poisons 
for cotton-worm: Ist, it can never be so cheap; 2d, it must touch the 
insect to be effectual. Paris green sticks to his food, and whenever he 
eats leaf enough he must die. I think, however, for cabbage worms 
and any collections of caterpillars the kerosene is the thing. I in- 
tended to try it on some social caterpillars I found congregated on 
hickory trees, but in one night after finding them they had completed 
their moult and dispersed. Circumstances then intervened which pre- 
vented my identifying my interesting hickory worm. 
I have many chrysalids of Aletia yet, which I keep dry, but other- 
wise exposed to the climate, to see how they will winter. 
There is only one other set of observations to report upon; and, look- 
ing at its barrenness of results, this deserves no notice. For several 
days and nights I had good opportunity to watch the moths of the 
cotton field. The owner of a perambulatory sorghum mill and evapo- 
rator was at work in one corner of a cotton field from 5th to 15th of 
September. I took up my camp with him. The nights and mornings 
were unusually cool. In the very early morning hours I could find 
nothing, see nothing. The habits of Aletia, which I was after, remain 
still a mystery as to my skill. But I can say that up to 10 or 11 
o'clock (p. m.) they were astir in clouds. Attracted by the fires at 
the sorghum works, they perished in countless numbers. But nearly 
all of those examined at the mill were males. The operator told me 
that where he had last made up a crop of the cane, somewhat farther 
south and west, the flies had been so numerous as to compel him to 
cover up his evaporator and suspend work until morning. The nights 
at that time were warmer. 
[A severe mnalarial attack at this time (18th September) put a stop 
to this kind of investigation. | 
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