The CRYPTOCEPHALIDES are a group of short, oval or truncate beetles, with long slender antennae: the sexes often differ in size and markings; they are usually found feeding upon the tender tips of the branches of wattle, young gum, and other low shrubs. _Elaphodes tiqrinus_ is a small, oval, reddish brown beetle, thickly clothed with golden yellow pubescence forming a mottled pattern over the elytra; it feeds upon the foliage of the black wattle. The members of the Genus _Ditropidus_ are small oval beetles, similar in shape and habits, black and shining; over 100 species have been described from Australia. The Genus _Cadmus_ contains some very handsome ovate insects, with long slender antennae; they chiefly frequent the young eucalypts: the larvae have the curious habit of living in jug-shaped cocoons fitting closely to the body, with the horny flat forehead closing the opening at the apex; when moving along the fore-legs are extended like those of a bag-moth. _Cadmus rubiginosus_, our largest common species, is under ½ an inch in length; it is of a general reddish brown colour, with darker markings. _C. litigiosus_ is a smaller yellow beetle; the head and thorax are black above, and the elytra yellow, finely punctured and spotted with black. The Genus _Cryptocephalus_ comprises a number of similar shaped beetles with smaller wrinkled head and thorax, and the tip of the abdomen truncate. _Cryptocephalus scabrosus_ is black, very rugose on the upper surface, with the tip of the elytra tinged with reddish brown: it measures about ¼ of an inch, and is common about Sydney. _C. viridinitens_ is slightly larger, of a uniform dark metallic green on the upper surface. The EUMOLPIDES are represented by one of our most beautiful species, _Spilopyra sumptuosa_, common on low scrub on the northern rivers of N.S. Wales: it is about ½ an inch in length, and is of a fiery coppery red and deep metallic tint, giving out beautiful shades of colour in a bright light. The Genus _Edusa_ contains a number of bright metallic coloured beetles of oval form, which are chiefly found among the foliage of eucalypts. _Edusa distincta_ is of the usual bright coppery red tint, with greenish head and thorax; it measures nearly ⅓ of an inch in length. _Rhyparida didyma_ is a dull yellow beetle, with a narrow parallel stripe of black down each side of the elytra; it is of the usual elongate oval form with the head turned down in front. They are found clinging to grass stalks; this and several other species are common on the North West coast of Australia.