On a Herpetomonas Found in the Gut of the Sandfly, Phlebotomus Argentipes, Fed On Kala-Azar Patients

a brief resume of the events leading up to them. At an informal discussion between Majors II. W. Acton and R. Knowles and Dr. Napier in 1922 it was resolved that the difficult and important problem of kala-azar transmission should be the first to be investigated by the various workers at the School who were in a position to undertake this work. It was shewn by Acton and Knowles (1914) in their studies of the Halteridium parasite of the pigeon that the degree of infection varied very much with the time and season of the year, and in connection with kala-azar the first point upon which information was needed was to ascertain if possible at what time of the year new infections occur in man. It seemed likely that the following information would be of assistance:?(1) a frequency distribution table shewing the date of com-