Observations of nine cases are reported. Three of these were in boys, aged two and a half, two and a half, and fourteen years respectively. Six occurred in girls, aged three, three and a half, nine, ten, ten, and twelve years respectively. In those cases in which previous tuberculin tests had been done, all were negative except in two cases, although at the time of the appearance of the lesions of erythema nodosum, or shortly after, all tuberculin tests were strongly positive with induration, tenderness, and erythema, which in most cases simulated closely the nodular lesions over the tibiae. In