The various phases in the investigation of malaria, which has yielded such remarkable results, have been followed quite closely in the editorial columns of The Journal.1 In the third annual report of the Italian Society for the Study of Malaria, Professor Celli2 briefly reviews the work of the society for the past year. A' number of small stations were established for the special study of the disease from an epidemiologic standpoint.
The work of these stations shows that where malaria prevails the anopheles genus of mosquito also occurs, but not vice versa. All stagnating water in marshy regions may be foci for the larvæ of anopheles; mixed salt and fresh waters are exceptions to this rule. The larvæ die in the water used for maceration of flax, whereas rice fields covered with stagnating or running water always harbor the larvæ of the malaria-carrying mosquito. The parasite of the