During the past three years we have isolated over 200 strains of Trichophyton purpureum from patients exhibiting cutaneous lesions which we have come to recognize collectively as a disease syndrome. The same types of lesions have been observed with sufficient frequency to point to the species of micro-organism. These cutaneous manifestations have been described in some detail.1Various parts of the body may be affected. The chief sites of involvement are the feet and the hands. The micro-organism is a common cause of onychomycosis. Lesions in the groin are not uncommon. Glabrous cutaneous infections on the extremities or on the trunk are occasionally observed. In a few instances generalized eruptions have been seen. We have isolated T. purpureum from infections of the hair follicles on 5 occasions. Three of the patients had infections of the beard, and in 2 patients the infections were on the leg, in both instances