14 
Braconid was observed to oviposit in the second generation of Phorodon 
humuli. The parasitic insect could not be obtained, nor conld any para- 
sitised lice be found later, as all were eaten up by Coccinellidae. It is 
quite natural that these valuable predaceous insects should increase to 
such an extent with the appearance of the Hop Louse in Oregon and 
Washington, and last year also the lice were kept in check to some 
extent, and only in certain yards was serious damage done. From all 
appearances it is hardly likely that the hop louse will do serious injury 
the present summer. 
Whether the only true parasite of the ladybirds known here as 
Uuphorus sculptus Cr. will ever become numerous enough to reduce the 
vast numbers of Coccinellidse is, in my opinion, rather doubtful. I 
have bred this parasite from the following species found in Oregon and 
Washington: Kos. 4, Hippodamia spuria; 5, H. parenthesis', 6, Coccin- 
ella Julians; 8, Adalia frigida. Owing to the backward season the 
other predaceous insect enemies of the Hop Louse could not be obtained. 
It may be said, however, that the species of Syrphids living thereon 
will prove to be many. 
REMEDIES. 
As requested, I have tried the more effective remedies recommended 
in your report of 1888 as far as was possible upon the few Phorodon 
found upon plums and prunes. No experiments could be made upon 
the hop vines, as up to the end of June but few lice appeared on them, 
and it was only where the Phorodon were taken from the plum trees 
and placed upon the hop vines that a few tests could be made. The 
results obtained were essentially the same as stated by Mr. Alwood. 
Kerosene Emulsion. — This was prepared as in Mr. Alwood's experi- 
ments: Oil, 8 pints; water, 4 pints; soap, one-half pound. It was used 
on Phorodon, on plum and hop vines, diluted twenty-five times, and 
the results were not quite as satisfactory as could be wished, the wash 
settling in drops and leaving some marks upon the leaves, while many 
of the lice escaped being killed. The emulsion prepared with 1 pound 
of soap and sprayed upon prunes gave no better results. An emulsion 
prepared with 1 gallon of kerosene, 2 gallons of resin compound and 
diluted to 75 gallons of wash did not work satisfactorily, as it would 
not spread as well as fish-oil, soap, or resin compound, and also left 
marks upon the leaves of hop vines treated. This latter emulsion is 
very easy to prepare, and its cost is about 18 cents for the 75 gallons. 
Soap No. 1. — This is Alwood's formula, yet instead of using Leon 
Hirsh's crystal potash lye, Babbitt's potash lye was used, as the first- 
named article could not be obtained. The soap is indeed an effective 
agent against Aphides, and, as far as the cost and efficiency are con- 
cerned, is one of our best remedies. Babbitt's potash lye, 1 pound; 
fish oil, 3 pints; soft water, 2 gallons. The lye is dissolved in the 
water and when brought to the boiling point the oil is added and the 
