265 
common phase of twitter to the work of a plant-louse of the genus 
Siphonophora. He figures and describes the insect, but does not give 
it a specific name. In a recent letter he has sent us an interesting 
sketch of a form of twitter caused by the plant-louse in question, which 
we reproduce herewith. Kerosene emulsion will prove efficacious 
against the Siphonophora, but where examination shows that the 
anthomyiid larva mentioned upon page 4.5, volume vi., Insect Life, is 
causing the damage there will be no remedy until the life history of the 
insect has been worked out, except to pull up and burn infested plants. 
LEGISLATION AGAINST INSECTS IN BRITISH COLUMBIA. 
Under the authority of the -'Horticultural Board Act, 1894" the 
Provincial Board of Horticulture of British Columbia has published a 
set of fifteen rules and regulations providing for a complete system of 
inspection of fruit and fruit trees in that province. The Board, which 
is composed of the Minister of Agriculture, the Statistician of the 
Department of Agriculture, the Inspector of Fruit Pests, and a repre- 
sentative from each of five horticultural districts, declares that the 
word pests 44 shall mean and include woolly aphis, apple- tree aphis, 
scaly bark-louse, oyster shell bark-louse, San Jose scale, red scale, 
borers, codling moths, currant worms, or other known injurious insects, 
and all fungous diseases. " Notification of the presence of pests is to 
be given by the owner of infested stock to the proper officer of the 
Board, and nursery stock shall not be distributed until a certificate is 
obtained from the Board that such stock appears to be clean ; the cer- 
tificate to remain in force for three months. Infected nursery stock is 
to be cleansed by using the remedies prescribed by the Board or 
approved by it, and shall not be distributed until certified as clean by 
the Board. Imported fruit is not to be taken from the wharf until 
inspected, and if found infested, shall be destroyed or returned to the 
shipper. Home-grown fruit is also subject to inspection, and if found 
infested shall be quarantined or destroyed. 
The regulations prescribe that all infected nursery stock shall be 
disinfected either by dipping in a solution of one pound concentrated 
lye and one pound whale-oil soap in five Imperial gallons of water, or 
by fumigation with cyanide of potassium. A lime-salt-and-sulphur 
solution is recommended as a winter spray for the woolly aphis and 
scale insects; a mixture of whale-oil soap, sulphur, caustic soda, and 
commercial potash in water as a summer remedy for the San Jose" 
scale, and the Bordeaux mixture for apple scab and all fungous dis- 
eases. All boxes, crates, or other packages which have contained 
infected nursery stock are to be burned immediately after the removal 
of the contents, and hop-fields, when infested with the hop louse, arc 
to be sprayed under the direction of the Board. The penalty fixed 
for the violation of these rules is a fine not to exceed fifty dollars for 
each offense. 
