About 350 species have been described from Australia, most of them dull brown or black in colour, though a few are brightly tinted or marked. _Agrypnus mastersi_ measures 1 inch, and is of a uniform brown colour clothed with fine buff down; it ranges from Queensland to Western Australia. The Genus _Lacon_ contains a great number of short, broad, dull brown clicks usually found under bark or stones. _Lacon caliginosus_, half an inch in length, is dull brown; it ranges from Tasmania to Queensland. _Alaus gibboni_ comes from the Richmond River; it measures 1¾ inches, and is broad in proportion; its true colour is black, but it is so thickly clothed with fine short grey down that it is almost a dull white. _A. sericeus_ is a smaller beetle clothed with an admixture of buff and chocolate down; I have found them pupating in decaying bark on dead trees on the Richmond River. _Tetralobus cunninghami_ is typical of a group of the large cylindrical “clicks,” in which the male has feather-like antennae, and the thorax is rounded. It is 1½ inches long, dark brown, with the under surface of the thorax clothed with reddish hairs. These large clicks are generally found in the interior on the trunks of trees. The Genus _Monocrepidius_ contains a number of slender black or brown insects usually living on flowers or foliage. _Ophidius histrio_, 1 inch long, is black, richly marked with dark yellow lines forming four parallel bars down the thorax, and a more irregular lance-shaped pattern on the wing covers; this is another fine species from the Northern Rivers, N.S.W. _Anilicus semiflavus_ is found on the Angophora flowers about Sydney; it is ½ an inch long, black, with the basal half of the elytra bright red. Family 32. Feather Horns. RHIPIDOCERIDAE. This is not a big family; the species are confined to the warmer parts of the world, and are chiefly distinguished by the peculiar structure between the tarsal claws, and the beautiful feathery antennae of the males. _Rhipidocera mystacina_, our typical form, is ¾ of an inch in length, elongate in form, with narrow sloping thorax and large feather-like antennae; the general colour is black, with the sides of the thorax and whole of the wing covers thickly spotted with white downy dots. I have often taken this insect in numbers in the North-West of Victoria. Family 33. Fire-Fly Beetles. MALACODERMIDAE. The members of this family have a softer integument than most beetles. They do not all emit light; the true “fire-flies” and “glow-worms” belong to the sub-family LAMPYRIDES.