 A disease of the brood which had often been mistaken for one of the foul broods and to which the name "sacbrood" is given was found to be due to a filterable virus.The deadly Isle of Wight disease of the adult bee, occurring in Great Britain and on the Continent, was discovered to be caused by the mite "Acarapis woodi" in the tracheæ, and an embargo was placed upon the importation of bees in order to prevent its introduction into the United States.Resorting to legislative means, Congress enacted the Federal Plant Quarantine Act of August 20, 1912, which immediately became effective as to certain quarantines, and was administered by the Federal Horticultural Board, consisting of five members appointed by the Secretary of Agriculture.