The Devil’s Coach-horse, _Creophilus erythrocephalus_, is our largest common species and has a very wide range; it measures over ¾ of an inch in length and is very broad in proportion; its general colour is black with the head bright red, the eyes and a rounded spot between them black; the elytra have a metallic purple tint. It can be often found in stables, or hunting round dead animals in the bush; when disturbed it cocks up its head, turning up the tip of its body at the same time in a very comical manner, from which habit the allied European species has probably derived the above popular name. _Actinus macleayi_ is slightly longer but more slender, and is our most beautiful species of this somewhat dull coloured family; the head and thorax are rich metallic coppery green, the elytra deep metallic purple; the basal portion of the abdomen is black, and the tip, antennae, and legs bright yellow. It is a native of the tropical scrubs of North Queensland; in the neighbourhood of Cairns I captured specimens in tins I had baited with bits of meat and had sunk in the ground to trap Carabidae, and into which they had been attracted by the food. _Xantholinus erythrocephalus_ lives in the stems of rotting grass trees, where the beetles can be collected in all stages of development; the beetle measures over ½ an inch in length; is of a much more elongate form; black; the elytra dull red, and the tip of the abdomen yellow. _Paederus cruenticollis_ is one of our commonest species, and is often found under stones in the bush; it is a very distinctly marked little beetle about ¼ of an inch in length, slender in form with long thickened antennae; black, with the thorax and centre of the abdomen red, and the elytra deep metallic blue. _Sartellus signatus_ is a curious little yellow beetle quite unlike the typical Rove Beetle; it is short and rounded in form, with the fore wings much longer than usual; is of a uniform light yellow colour, with a curious reddish brown mark in the centre of each elytron. It is common on our sandy beaches, where it hides under the seaweed and rubbish and feeds chiefly upon dead barnacles. Family 7. Ant Beetles. PSELAPHIDAE