18 BULLETIN NO. 4, DIVISION OF ENTOMOLOGY. 
days dead larve were found (June 7 to 11), but thereafter no further ef- 
fects were observed. Afterward the mixture was applied on a larger 
scale by Dr. Brakeley to the second brood, but with less suecess, be- 
cause the amount of kerosene reaching the vines was insufficient to 
penetrate through the numerous shields of leaves protecting the larva, 
and so a large proportion escaped; another attempt, using but 10 parts 
of water to one of the emulsion, succeeded better and did not injure the 
vines. Mr. Bullock, of Prospertown, tried the mixture, 1 part emulsion 
to 10 of water, and says that it destroyed the larvee ; but while it did no 
injury to the vines it seemed to check the growth of the berries; I am 
informed that they eventually ripened but were undersized. No such 
effects followed the use of a 1 to 15 mixture used under my direction, 
but it was not so effective on the larve. Afterward a small space was 
treated with a 1 to 10 mixture where the larve of the second brood were 
nearly full grown, and the result was all that could be expected ; most 
of the larve were destroyed and the vines were not hurt; berries un- 
fortunately had been previously destroyed by the insects. The effect 
of kerosene on the eggs was then tried; pure kerosene was first directly 
applied to a few, and the effeet was to destroy the vitality of the egg 
at once, it becoming loosened at the edges and flattening toward the 
center. The emulsion, diluted with 16 parts of water, was then applied 
to about two rods where eggs were numerous; for afew days thereafter 
eges decreased in number, and no imagines were found on the spot ; at 
the end of four days, however, the spot was as much frequented as ever 
by the moths, andeggs became more numerous ; I then waited until the 
moths had nearly disappeared (August 20-23) and again applied kero- 
sene to another spot of 4 or 5rods, applying slightly more than a gallon 
to arod and making the mixture 1to10. As the moths had not all 
disappeared and I was desirous of making my results exact, I marked 
a number of sprays and counted the eggs, marking only sprays contain- 
ing a number (4-14), and setting close to them a stick marked with the 
number of eggs on the spray. The marked plants were treated pre- 
cisely as was the balance of the patch, and the next day I examined the 
result; in a few instances the total number of eggs on the spray had in- 
creased, but fully 30 per cent. of the number marked on each spray had 
lost vitality, flattening out and whitening at the edges; next day nearly 
all had succumbed and the marked sprays were carried off to watch fur- 
ther developments; the leaves touched by the kerosene were easily 
distinguished, and in each case every egg on every leaf which had been 
touched by the kerosene first became depressed in the center, then | 
loosened and white around the edges, and finally dried up, leaving only 
a small, glistening spot on the leaf; on leaves which the emulsion had 
not touched the eggs underwent no change whatever. Early in October 
(5th to 7th) again examined the space treated; the vines had all re- 
covered from the damage done by the larve and were promising well for 
