This group includes a number of small beetles that have the elytra usually not covering more than half of the abdominal segments; the antennae thickened toward the tips; maxillary palpi large, and the tarsi three jointed. The ordinary collector is very apt to pass over these small creatures, but many interesting forms are found in this country by sifting rubbish, or examining debris along the water’s edge, which can be gathered up in a stout bag and afterwards shaken over a sheet of white paper. I have captured them along the edges of lagoons in summer time by pouring buckets of water over the dry cracked mud, and as they were drowned out gathering them into small tubes. They can also be taken with a sweeping net when on the wing; in Europe many species are found in ants’ nests. Westwood believes that they feed chiefly upon _Acari_ and other small creatures. Large numbers have been described from this country, chiefly through the researches of the Rev. R. L. King (Trans. Ent. Soc. N.S.W. 1865). Messrs. Sharp, Westwood, Schaufers and Blackburn added to this number; while in 1900 Raffray published his Monograph on the family (Pro. Linn. Soc. N.S.W. 1900), in which he described 45 new species, and brings the number known up to 200. _Pselaphus lineatus_, a reddish beetle, measures 1½ lines in length, and is found about Sydney; it has a wide range over N.S. Wales, Victoria, and South Australia. Lea (Pro. Royal Soc. Victoria 1905) records four species of the Genus _Articerus_ found in ants’ nests, all of which appear to have a wide range; _A. curvicornis_, originally described by Westwood from ants’ nests in Melbourne, is also found in Tasmania, S. Australia and N.S. Wales. Family 8. Comb-horned Beetles. PAUSSIDAE.