_Promecoderus concolor_, typical of the genus, is a shining black beetle about ½ inch in length, of a curious cylindrical shape with the head turned down in front. These beetles are found all over the interior in dry country under stones or logs. The allied Genus _Parroa_ was formed by Castelnau for several curious beetles taken in the interior near the Paroo River. _Parroa noctis_, from Kalgoorlie, W.A., measures over 1 inch in length, and is a rounded solid-looking black beetle. The bulk of the species once included in the Genus _Harpalus_ is now divided up into a number of groups; most of the small black carabs running about in the suburban gardens in the early summer belong to this division. The FERONIDES comprise a number of our largest carabs: _Catadromus australis_ measures nearly 2 inches in length, is broad in proportion; it is shining black with the wing covers broadly ridged, and their margins and the hind portion of the thorax richly marked with bright metallic green. _C. lacordairei_ is smaller, and similar in general form, with the thorax smaller and the metallic colouration on the thorax running right round to the hind margin of the head. Both these beetles are found along the edges of swamps and lagoons in the Murray country living under dead logs, where their black banded larvae may also be found, sometimes feasting on small frogs. All the beetles known under the Genera _Homalosoma_ and _Trichisternus_ have been placed in the new Genus _Castelnaudia_ by the Russian entomologist Tschitscherini, as both the former names were preoccupied. This group contains many large handsome beetles, chiefly confined to our coastal forest country, where they live under dead logs. _Castelnaudia renardi_ is one of the common species in the Tweed River scrubs; it measures 1½ inches in length; is black with the parallel striae on the elytra widely apart; the head very large, is turned down and furnished with long powerful jaws. _C. imperiale_, from Southern Queensland, is a very handsome species; it is about the same size as the former but has the thorax and elytra more flattened; and the head, thorax, and margins of the wing covers are rich metallic green. In November I took several specimens on the top of Mt. Tambourine, S. Queensland, under deeply buried logs by the roadside, where they live in broad excavated galleries; in two nests I found three larvae and eggs. The former, probably by their size only a few weeks old, were elongate, flattened, light brown to ochreous coloured creatures, with the head and dorsal surface of segments chocolate brown. The head is broader than long, flattened, and furnished with long curved brown jaws, and has also a stout incurved tooth near the base of each jaw. They were very active creatures and lived for over a month in captivity. The eggs were dull yellow, ⅜ of an inch long, broadly rounded, and were enclosed in a thin clay shell like the rind of an orange.