_C. circumcincta_ is a smooth, dark green beetle with the outer edges of the wing covers marked with yellow; it is sometimes taken about Sydney, but is not very common. The smallest Australian species is _C. tenuicollis_, described by Macleay from specimens I collected on a sandy flat near the Barrier Ranges in N.W. Australia; it is a rich, metallic red insect with slender legs and small thorax. On a sandy road near Cairns, N. Queensland, several small species were so plentiful that they often flew up in clouds, and I have taken scores in half an hour with a butterfly net. The tropical Genus _Distypsidera_ is represented by about a dozen species, chiefly confined to North Queensland, where they hunt over the stems of trees; when approached they run round the trunk to keep out of sight; they are broader and more thickset than the _Cicindela_, and their eyes are very large and prominent; _D. flavicans_ is the only one that comes down as far as Northern N.S. Wales. The researches of Hacker in North Queensland have added several new and interesting species of Tiger Beetles from the Coen River, some of which are closely allied to New Guinea forms. Family 2. Carnivorous Ground Beetles. CARABIDAE. These are broader and thicker set than the Cicindelidae, varying in size from several inches to a line in length; the head is smaller than the thorax; and most of them are black or reddish brown, while others are richly marked with metallic tints. They are most numerous in open forest country, hiding under logs or stones during the day and hunting over the ground at night: when camped in the bush, where logs are plentiful, the entomologist can often trap many interesting species by sinking empty tins into the soil, into which they readily tumble. The larvae are slender creatures with three pairs of simple legs; their bodies are protected with stout horny plates, and the head is furnished with large powerful jaws; they are found in the same situations as the adult beetles, and devour all kinds of insects that they can capture; the larger ones even eat small frogs. This family has been divided into a great number of sub-families which it is hardly necessary to enumerate here. Australia is very rich in _Carabidae_; over 1,600 species have been described. Chaudoir described many in Russian and Belgian; Newman, Westwood, Pascoe, Hope, and Bates in English; Castelnau, Macleay, and Sloane in Australian scientific journals; so that the literature dealing with these beetles is very scattered, but the references can be found in Masters’ Catalogue.