For several years past an eruptive disease of the skin of the horse, characterized by the development of small pustules, has been recognized in this country, particularly among animals sent for exhibition. For some reason which is not well defined, the disease is considered to have been imported from America; it is usually mild in character, though for the time troublesome; the pustules very soon become dry, and the crusts fall off, leaving small scars which soon disappear. It is essentially a form of ecthyma, and will be treated under that heading.