In January 1932 the writer received for examination a sample of narcissus bulbs, variety Diadem. The bulbs, which had been grown in Abingdon, England, for a number of years, were submitted on account of their persistently unsatisfactory growth. It was found that they were heavily infested by a species of Tarsonemid mite, which was present in sufficient numbers to account adequately for the unhealthy condition of the bulbs. No record could be found relating to the occurrence of such an infestation actually in Europe; the condition was, however, already known in the U.S.A. Ewing4 in 1929 described a new Tarsonemid occurring in narcissus, which he named Tarsonemus approximatus, Banks, var. narcissi, Ewing. The mite was named from material obtained in narcissus bulbs from the Pacific coast, which bulbs it appears had been imported from Holland. Doucette2 in the same year, 1929, published a short account of the activities of the mite with which he had become familiar in both Philadelphia and California as early as 1925, in these cases also in bulbs of Dutch origin. No other reference to the mite could be found in literature, although it is perhaps hardly necessary to state that allied species are known to be highly injurious to plants, e.g., Tarsonemus tepidariorum on ferns (Cameron1), T. fragariae and T. pallidus on strawberry (Massee7), and T. essigi on blackberry, etc. (Essig3).