In an organised campaign of house-fly extermination it may rather be expected that the principal trouble will be with the stable men of unsanitary mews. In the United States of America very stringent bye-laws have been made and enforced. Some of these, perhaps, deserve consideration for adoption, with judicious improvements, in England, but the policy of the OPEN DUST-BIN _and_ CREMATION raises new hopes of success far beyond any advantages hitherto obtained in America. CHAPTER XI CONTROL WITHIN THE HOUSE Many minor plans have been proposed for obviating or alleviating the perils and plague of invading fly swarms; several such plans may be well carried out on a private domestic scale, but one cannot expect any of them to be adopted universally. In domestic methods people will prefer some one plan, some another, whilst some will not personally aid in the work of fly destruction in any single way perseveringly. This latter circumstance emphasises the necessity of a dominant control by local authority for the safeguarding of all inhabitants, including the delinquents themselves in spite of themselves. The plan, as detailed in the last chapter, of enticing breeding females to lay their eggs within depositories of discarded food remnants and garbage, can be practised on a smaller scale with great advantage everywhere. Kitchen refuse of many kinds, not neglecting potato and turnip parings, cabbage leaves, or even tea leaves, should all be collected in brown paper bags, which should be left open for a few days in suitable places round about the house for the free access of gravid female house-flies. Every such collection should he cremated on the third day. In a paper, read at a recent congress of the Royal Sanitary Institute, on "Destruction and Prevention of Household Pests," Dr. Gay advised rich and poor, in every household, whether or not a sanitary dust-bin was in use, instantly to _wrap up in paper_ all such fly-breeding materials in readiness for cremation. However, to do so would be missing the much more effectual course of applying my "egg-trap" plan of collections in exposed _open bags_ for cremation on the third day.