The Banksia beetle, _Cyria imperialis_, has a wide range and is common about Sydney upon the foliage of the stunted honeysuckle bushes (_Banksia_); the larvae feed in the stems. It measures 1½ inches in length; is of a uniform shining black colour, richly marked on the upper surface with bright yellow forming four irregular bands across the elytra, and the under surface is lightly clothed with grey hairs. The Genus _Diadoxus_ contains two very distinct species, the larvae of which feed chiefly on the stems of our native cypress pines, and sometimes attack and destroy introduced pine trees. _Diadoxus scalaris_, very variable in size, measuring from ¾ to 1¼ inches, is a slender pale yellow beetle, with the hind margin of the head and thorax marked with black, and the wing covers so thickly mottled with reddish brown that the yellow only forms a row of blotches down the back. It has a wide range from N.S. Wales to West Australia. _Diadoxus erythrurus_ known in the west as the “pine scrub beetle,” is a much smaller insect slightly over ½ an inch; the head and thorax are almost black; the wing covers are dark, the basal portion has a double blotch of yellow on each side followed by a row on either side of three spots; the under surface has a greenish tint when alive. The larvae of this species first feed round the stem under the bark, cutting the sap wood, and where the infested tree is small, cause it to snap off. The large rich metallic green or coppery _Chalcophora_ are more tropical beetles, the largest of which are restricted to Queensland and North Australia; Masters lists 24 species in his catalogue, chiefly described by Saunders (Trans. Ent. Soc. London 1872), and Waterhouse in the same Journal three years later. _Chalcophora vittata_ measures nearly 1¾ inches in length, and is broad in proportion; its general colour is deep metallic green, with the head and thorax shaded with rich coppery tints; the elytra are finely ribbed and are powdered with a yellow pubescence lining the parallel striae, and also forming two spots on the sides. _Chalcophora farinosa_ is a smaller and more slender species with a narrow thorax, and pointed wing covers; in the neighbourhood of Cairns, N.Q., I used to take them in the early morning resting on the wild banana leaves. _Nascio parryi_ is a small black beetle with a long thorax of a uniform width; the wing covers are short in proportion, and curiously marked with reddish orange. It is generally found upon the foliage of eucalypts, but nothing is known about its life history. The members of the Genus _Melobasis_, of which about 30 have been described, are small, brilliantly coloured metallic green and gold beetles. _Melobasis splendida_, not much over ¼ of an inch in length, is bright green, the thorax and elytra marbled with dull purple. The larvae feed in the dead branches of _Acacia longifolia_.