_Cardiothorax howitti_ is also found under logs; it is an elongate beetle, black with a dull purple tint on the thorax, which is flattened and almost round, a regular rim running round the margin; it is arcuate behind the head, and produced into a spine on the hind margins; the wing covers are elongated to the apex, and ribbed. The members of the extensive Genus _Adelium_ are found under logs; some species are quite common, clustering together in considerable numbers; they are all black or coppery tinted. These beetles are about ¾ of an inch in length; the thorax is roughened, and the wing covers more or less striated. The Genus _Chalcopterus_, which now includes most of those described as _Amarygmus_, are black or brightly metallic coloured beetles; the head and thorax are small and curve downward; the wing covers are large, convex, and pointed at the tips. They are found crawling about on tree trunks, or hidden under dead bark, and give out a very pungent offensive odour when handled. _Chalcopterus variabilis_ measures ½ an inch in length; its head and thorax are black, the elytra rich coppery red, and it is common about the Sydney scrubs. The common Mealworm, _Tenebrio molitor_, has a world-wide range; it was introduced into Australia at a very early date, and not long ago a packet of seeds imported from England was found on examination by one of the inspectors of the Agricultural Department N.S.W. to be full of the shining wireworm-like larvae of these beetles. It is a common beetle in stables and produce stores. Family 39. CISTELIDAE. These are delicate, elongate, long-legged beetles, with weak integument, and are closely allied to the TENEBRIONIDAE, only differing from them in having comb-like or pectinate claws on the tarsi; and their larvae are like wireworms. The Genus _Atractus_ comprises a number of slender beetles of bright metallic tints common upon the flowering shrubs in summer; _Atractus viridis_, ½ an inch in length, is bright metallic green, with the thorax and shoulders tinted with coppery red, the wing covers deeply marked with punctured striae. _A. virescens_ is a smaller species with a more dull metallic coppery tint. The members of the Genus _Allecula_ are larger beetles, with long slender legs and antennae, shining brown or black in colour, with finely striated elytra; the larvae are slender, dark, shining brown wireworms living in decaying wood. _Allecula subsulcata_ is slightly over ½ an inch in length, of a uniform black colour, with the last three joints of the antennae and the last two of the tarsi pale ferruginous. The larvae breed in the rotten stems of dead grass trees, and the beetles are generally found hiding among the foliage. Family 40. LAGRIIDAE.