EXCEPT for Martin and Smith's1 attempt to map the geographic distribution of published cases of blastomycosis (Gilchrist's disease) occurring in the United States, no epidemiologic data exist concerning the prevalence and distribution of this serious disease. Recently an epidemic of blastomycosis has been observed in North Carolina, attacking 10 persons. The results of the epidemiologic and clinical studies will be published by Drs. J. G. Smith, Harris, N. F. Conant, and D. T. Smith. Dr. J. G. Smith, from the Communicable Disease Control Section of the North Carolina State Board of Health, has informed us that all 10 patients lived within a radius of four miles, and two cases occurred even in siblings. This is obviously the first authentic report on an epidemic of blastomycosis, and the results of their studies should be of far-reaching importance in the understanding of the epidemiology of