Horner,1in 1871, described a herpetic corneal disease occurring simultaneously with herpes nasalis in persons suffering from catarrhal disease of the respiratory organs. He called it herpes corneae febrilis. The case we are reporting is of a similar nature except that it occurred during the course of therapeutic malaria in a person suffering from cerebral syphilis. The cornea of the left eye was involved in a herpetic eruption which soon progressed to a definite dendritic type of keratitis. Simultaneously, there was a herpes outlining the distribution of the infratrochlear nerve on the left side of the nose. Thus, the nerve involvement was confined to the long ciliary and infratrochlear branches of the nasociliary nerve. Consequently, for the purpose of correlating the complete clinical picture, the febrile origin and the known pathology of trigeminal herpes, we used the term herpes ophthalmicus febrilis in describing our case. The case is of