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fasciata. This method is objectionable on account of the yellow stains 
and disagreeable odor. 
Pyrethrum burned in the proportion of 1 pound per 1,000 cubic 
feet with an exposure of two hours will stupefy Stegomyia fasciata / 
it requires 2 pounds to kill them outright. 
From the limited number of experiments made and from previous 
experiments we consider sulphur dioxid the best of the gaseous insec¬ 
ticides for this purpose. 
Formaldehyd gas is not an insecticide, and therefore not applicable. 
O 
