During the course of investigations into the distribution and seasonal activity of the tick, Ixodes ricinus L., in South Wales (Edwards & Arthur, 1945), a male tick was recovered which on examination was found to be a member of Ixodoidea, but which differed from the normal male of I. ricinus L. It was recovered from Margam Moors (Glamorgan, South Wales) by one of the writers (D.R.A.) in 1945, whilst dragging a blanket over rough vegetation, a method previously employed by MacLeod (1932) for the recovery of ticks from grassland. This is the only specimen of its kind which has been found, despite the examination of several thousands of males during the past three years. It has therefore been considered desirable to place on record a description of the form. When placed in a tube containing ten unfed females of I. ricinus, no mating occurred. Under similar conditions a typical male of this species mated with one unfed female within 7 minutes of its introduction.