The danger of the introduction of yellow fever into Oriental countries has been the subject of much discussion since Sir Patrick Manson first drew attention to it in 1903. In 1911 Major (now Lt.-Col.) S. P. James, I.M.S., was deputed by the Government of India to study the conditions in the endemic areas of Central America, and in the principal sea-ports between that country and India. His report, published in 1913, was a most valuable contribution to our knowledge of the problems surrounding this subject. Among other recommendations, Major James suggested that further inquiry should be made with reference to the occurrence of Stegomyia fasciata in Far Eastern ports.