20 BULLETIN NO. 4, DIVISION OF ENTOMOLOGY. 
fore stated, they do little injury now, and the danger seems small. One 
gentleman informed me that there were only a few larve on his bog, 
and he was rather sorry, as there were not enough to experiment with ; 
I visited his bog a day or two afterward and found larve pretty evenly 
distributed over the bog, but doing no great damage. Some time after- 
ward they had all disappeared, and the gentleman was jubilant. He 
was correct; they had gone—into the pupa state. The moths emerged, 
and in due time the second brood of larvee. I did not thereafter hear — 
any complaint of lack of insects to experiment with. 
To return. It is at this time that they must be attacked, and best of 
ali with kerosene; this will penetrate through and saturate the leaves, 
and, if liberally and carefully applied, will kill by far the greater part of the 
larve. The kerosene emulsion should be made with two parts kerosene 
to one part sour milk, and churned with a force pump; the ‘‘aquapult” or 
“Lewis” willanswer. Ifthe milkis heated and the vessel containing the 
kerosene warmed, ten or twelve minutes, and sometimes less, of churning 
will suftice to complete the emulsifying process, and the result will bea 
soft butter which will mix perfectly with water; it should be dissolved 
with a small amount of water, and then any desired quantity may be 
added; the most effective proportion for this insect at this stage is ten 
parts of water to one part of the emulsion. This will not hurt the vines, 
and should be applied thoroughly, with a syringe or a pump with a 
sprinkler attachment, if possible. A second application a week later 
might be advisable to reach any larve that had afterwards hatched or 
previously escaped. If the water has been drawn off gradually the 
larve will continue to hatch for as many days as the water occupied in 
receding, and the same number of days is gained in combating them. 
Another plan would be not to await the hatching of the larve, but 
immediately after drawing the water and ascertaining the presence of 
living eggs, to apply Paris green mixed with cheap rye flour, while the 
vines are wet with dew or rain, and thus poison the food the young larve 
will be compelled to subsist on. No danger of poisoning the berries is 
to be apprehended at this stage, but perhaps the former plan is as cer- 
tain in results; it is entirely without danger, and therefore preferable, 
A few larvee will probably escape and pass into the chrysalis state, which 
they do usually on the ground among the rubbish. It is now necessary 
to watch for the first appearance of the moths, and as fast as they ap- 
pear they should be caught with hand-nets; the time will be between 
the Ist and 15th of June, usually about the 10th. I noticed that the 
first moths that emerged were males; three evenings I caught speci- 
mens, and all were males. Dr. Brakeley had been in the habit of using 
a rather cumbrous machine mounted on wheels to catch the moths, and 
the first evening of using this all that I examined of the captures were 
males. On June 9 I found the first female, and found the same evening 
male and female in coitu. The female I dissected, and found the eggs 
still immature ; later I caught and confined several females, and in all 
