Peach and Almond trees, with their leaves curled, distorted and thickened, some yellowish-green, others rosy or purplish, are infested with a fungus, scientifically known as _Exoascus deformans_. It is one of the ascomycetes; in the same genus is included the fungus responsible for the “witches’ besoms” of our birch-trees. At maturity the fungus bursts through the cuticle of the leaf, coming to the surface to disperse its spores or seeds. The part of the leaf with the ripe spores upon it, is minutely velvety; the whitish bloom may be easily seen with the unaided eye, but of course individual spores could not be seen without the aid of a powerful microscope. It is said that this disease is very rarely seen in seasons following an uniformly mild spring. At the moment of writing we have not observed many oaks defoliated by caterpillars. The following note is taken from the Museum Record Book, June 1, 1899: “Oak-trees badly attacked by the larvæ of the green leaf-roller (_Tortrix viridana_), which cause much damage to the foliage. The continuous falling of the excreta of these small caterpillars sounds like paper being pricked by a fine pin, and is very noticeable in a quiet wood.” In 1902 these larvæ were again equally troublesome in this district. The ingenious work of the leaf-rolling Beetles (_Genera apoderus_, _Attelabus and Rhynchites_) may be observed at this time of the year. The female, in some species, rolls a leaf into a tube, in others she makes a compact little thimble of the upper half of the leaf, in the centre of which she puts an egg. Hazel, oak and chestnut leaves so folded are not uncommonly seen in this district. Specimens may be usually seen in the vivarium towards the end of the month. June is a good month for the observation of what are termed Social Flowers. The veronica, in many meadows, especially those in which the grass is kept short by grazing, now exhibits round patches of several yards in diameter, which are beautifully blue. The little mouse ear (Myosotis) makes similar patches, but in much less conspicuous tints. These plants appear to have the power not only of spreading themselves, but of excluding intruders, and their territories sometimes show no other form of vegetation. The common daisy is also a social flower, but much less able to keep others at a distance. So also the wild strawberry. * * * * * QUESTIONS FOR ANSWERS. (_Continued from p. 31, which see._) (14) Give the meanings of the following prefixes: (1) sub, (2) pseudo, (3) ob, (4) hypo, (5) hyper, (6) para, (7) ab, (8) aero, (9) con, (10) amphi, (11) ana, (12) pro.