The CHRYSOMELIDES are one of the typical groups; many of them are rich in bright metallic tints; are either rounded or oval in form; and their larvae are active six legged grubs that crawl about the foliage. _Aesernoides nigrofasciatus_ is a handsome, broad, convex, black beetle, with the elytra crossed with three broad irregular bands of dark orange yellow; it measures nearly ½ an inch in length, and is common on several shrubs in the Northern River scrubs. The Genus _Phyllocharis_ contains a number of more elongated beetles with thicker antennae; they are chiefly found upon grass. _Phyllocharis cyanicornis_ measures slightly over ⅓ of an inch in length; the general colour is dark orange, with the antennae and legs black; and the dorsal surface of the thorax and elytra are irregularly blotched with shining blue-black. It has a wide range over Australia and Tasmania. _P. cyanipes_, a larger species from N. Australia, has the head, thorax, blotch on each side of base, and tips of elytra light yellow, with the rest of the wing covers shining black. _Lamprolina perplexa_ is a smaller, elongate, metallic, dull bronze coloured beetle, with yellow head and thorax; it is common upon the foliage of the native blackthorn, _Busaria spiniferous_. The larvae of several species of the Genus _Calomela_ feed upon the foliage of the black wattles: they are short, squat grubs, with black heads and small green oval bodies. _Calomela paralis_ measures 2½ lines in length; its general colour is dark orange yellow, with a broad parallel band of rich metallic green occupying the centre of each wing cover and tapering down to the tips; the elytra are deeply and finely punctured. Twenty-five species are described from various parts of Australia, chiefly by Baly (Trans. Ent. Soc. 1856–1863: and Ann. and Mag. N.H. 1862). The Genus _Paropsis_ is the most extensive and characteristic of all our plant-eating beetles, and some of our common species are very plentiful about Sydney. Marsham wrote a monograph of the species (Trans. Linn. Soc. 1808), placing them in the Genus _Notoclea_; in Masters’ Catalogue 269 species are listed; since then, Blackburn has revised the Genus (Pro. Linn. Soc. N.S.W. 1896–1901), and added a number of new species.