No. 33.] 317 
introduced several of the beetles. The insects attacked the leaves 
with their usual vigor, and the following day, we found that instead 
of the enclosed beetles attempting to make their escape through the 
netting, numerous visitors were on the outside trying to make their 
way in. Cobs dipped in soluble phenyle, a liquid having a powerful 
odor resembling that of coal tar, gave the same result. 
We tried also the kerosene emulsion, and soluble phenyle, diluted 
with various proportions of water, but they seemed harmless to the 
beetles in the degree of strength that could be used without injury 
to the plants. 
After making experiments upon the Striped Cucumber beetle 
during three successive seasons, we have come to the conclusion that 
it is far more satisfactory to protect the plants from the ravages of 
this insect than to attempt to destroy or repel it by any other means. 
By protecting the plants, we escape not only the injury from the 
beetles upon the leaves, but also that of their larvee upon the roots. 
The latter very often destroy the plants that escape the ravages of 
the beetles. Further, by protecting the plants, we enhance their 
growth, as we were able to show the past season by many instances. 
There are two ways of protecting the young plants. One is to 
cover the hill before the seed leaves appear above ground, with a 
plant protector made by a frame of light boards covered on the top 
with mosquito netting. The other way is to start the plants upon 
inverted sods in the cold frame; transplanting to the garden or 
field after they have attained two or three rough leaves. In the 
latter case the beetles will harass the plant to some extent, but they 
will rarely destroy them, unless the weather should be very warm 
and dry after the transplanting. 
The method sometimes recommended of outnumbering the bee- 
tles by planting a score of seeds where we desire one plant, though 
it may sometimes work well, is wrong in theory. By multiplying 
the plants we doubtless multiply the beetles, and in time the latter 
may so increase as to destroy any number of plants. 
Tur CABBAGE CATERPILLAR. 
After very many experiments upon the larva of the cabbage but- 
terfly, Prerzs rape (L.), we have found but one that is satisfactory, 
viz.: Pyrethrum or Buhach powder, applied with a bellows. This 
substance, while almost instant death to the caterpillars, is not iniu- 
rious to the human family or to plants, and hence may be used with en- 
tire impunity. Wefound that the samples of the powder used were 
efficacious when diluted with equal bulk of air slacked lime, but 
when the proportion of the lime was doubled the mixture was not 
fatal to the insects. Flour is sometimes used as a diluant instead 
of. lime. So much depends upon the freshness and purity of the 
powder used, that it is impossible to give a formula that will be sat- 
isfactory in all cases. It is said that a perfectly fresh, pure powder 
will bear to be diluted much more than half, and still be fatal to the 
