This is a peculiar, mildly inflammatory, sycosiform, keloidal, acne-like disease of the hairy border of the back of the neck, often extending upward to the occipital region; partaking, especially later in its course, somewhat of the nature of keloid. Several or more acne-like lesions, papular and pustular, closely grouped or bunched, appear, developing slowly, usually to the size of peas; are red, pale red, or whitish, often enveloping small tufts of hair, and attended with more or less hair loss. Its course is gradual and persistent. It is an exceedingly rare condition, the exact nature of which is still obscure. #Give the treatment.# Treatment, which is usually unsatisfactory, consists of stimulating applications--the same, in fact, as employed in sycosis, sulphur and ichthyol deserving special mention. Depilation is essential. #Impetigo Contagiosa.# #Give a descriptive definition of impetigo contagiosa.# Impetigo contagiosa is an acute, contagious, inflammatory disease, characterized by the formation of discrete, superficial, flat, rounded, or ovalish vesicles or blebs, soon becoming vesico-pustular, and drying to thin yellowish crusts. #Upon what parts does the eruption commonly appear?# Upon the face, scalp, and hands, and exceptionally upon other regions. #Describe the symptoms of impetigo contagiosa.# One, several or more small pin-head-sized papulo-vesicles or vesicles make their appearance, usually upon the face and fingers. In the male adult the region of the neck and beard is a favorite situation. They increase in size by extending peripherally, but are more or less flattened and umbilicated, and are without conspicuous areola. The lesions may attain the size of a dime or larger, and when close together may coalesce and form a large patch. In some cases distinct blebs result, and a picture of pemphigus eruption presented; it is probable that many of the cases of "contagious pemphigus" belong to this class. New lesions may appear for several days, but finally, in the course of a week or ten days, they have all dried to thin, wafer-like crusts, of a straw or light-yellow color, but slightly adherent, and appearing as if stuck on; these soon drop off, leaving faint reddish spots, which gradually fade. In some cases there is so decided a tendency to clear and dry up centrally while spreading peripherally that the eruption has a ring-like aspect; this seems especially so in the bearded region of the male adult.