Fig. 1.—Mida salicifolia, haustorium in longitudinal section X 8. Between the roots of the parasite (p) and of the host (h) is the haustorium with three cortical folds, each with a layer of collapsed cells (c). Down the centre of the haustorium runs a massive vascular cylinder, which becomes distended by a core of parenchyma (m) before it enters the host root. has been shown to possess haustorial connections with neighbouring roots (Herbert, 1921, 1925). But Skottsberg (1930) has confirmed that the New Zealand species are not very closely related to any other members of the Santalaceae. It was interesting, therefore, to determine whether the genus Mida exhibited parasitism. Dr. J. A. Rattenbury, of the University of Auckland, very kindly obtained roots of Mida salicifolia for me which had developed haustoria in contact with roots which he thought might be kauri (Agathis australis). Sections passing through these haustoria (Fig. 1) show a structure similar to those of other Santalaceae figured by Rao (1942). The structure is much more complex than the simple swellings of Exocarpus bidwillii, and the contact with the vascular tissue of the host is more complete. The cortex of the larger haustoria is thrown into a series of collars or folds which are traversed by strands which Rao (1942) interprets as collapsed cells caused by differential growth rates in the outer and inner tissues of the haustorium. Towards the host root the vascular cylinder becomes distended by a mass of dense parenchyma cells. This feature was recorded in the material examined by Benson (1910) and Rao (1942). In the roots examined the parasitic tissue did not extend beyond the outer xylem of the host. It seems probable, however, that if the haustoria persist from one year to the next that they will become more deeply embedded in the xylem. Anatomical investigation confirmed that the host roots were Agathis australis, but it seems probable that Mida will prove to resemble many other Santalaceae and parasitise a number of hosts. Euphrasia Species of the genus Euphrasia have long been known to be partial root-parasites in other parts of the world (Heinricher, 1897, 1898). It seems probable that several New Zealand botanists will have confirmed for themselves that our species of Euphrasia are also parasitic, but this does not appear to have been stated categorically in print. Cockayne was well aware of parasitism in Euphrasia, and it is to be expected that he confirmed this in New Zealand. His statement in New Zealand