The NYSSONIDES comprise a smaller group of closely allied forms, differing chiefly in the venation of the wings. Smith has described most of our species. The members of the Genus _Gorytes_ are represented by five described species; all small, active, bee-like insects with coppery fasciae upon the abdomen; several of these are known in the bush as “policemen flies” from their habit of coming round and catching flies upon one’s clothes and even snapping one off the back of one’s hand; these flies are killed with their stout jaws and deposited in their nests constructed in the ground. The curious, large, reddish brown wasp, _Stizus pectoralis_, from Queensland, at first sight might be taken for a _Thynnus_, but the distinct form of the body, and the antennae thickened toward the tips, show that it could not belong to the flower wasps. It is now placed in the allied Genus _Sphecius_. The PHILANTHIDES are easily distinguished from the other groups by the curious rugose or punctured integument which makes them look as though coated with armour plate, and the curious constrictions or rings between the abdominal segments, becoming smallest toward the tip. They are generally black or reddish brown, marked with pale yellow spots and bands. With the exception of one species of the Genus _Philanthus_ all ours have been placed in the world-wide Genus _Cerceris_. I have generally captured them about flowers, or flying round bushes infested with scale insects that were throwing off honey dew, which sweet secretion has a great attraction for small hymenoptera of many different families. Eight species are described by Smith and Saussure; there are probably many new species to be recorded. Nothing is known about their habits in this country, but the European species form nests in the ground, which they provision with small beetles; and each species is said to confine its attention to a different group of beetles; one uses only small weevils; another carries off chrysomalids, and so on with each species. The CRABRONIDES are another small group, and under the present classification all our species have been placed by Smith in the world-wide Genus _Crabro_. They are medium sized black wasps with broad stout heads and unstalked bodies, generally banded with orange, red, or yellow; they form burrows in the stems of plants, which they store with captured flies. Five species have been described from Australia and Tasmania. The BEMBECIDES are very handsome, smooth, shining wasps of fair size, with broad bodies, rounded and broadly pointed at the extremity. They are generally met with along sandy pathways and roads, flitting along in front of one, settling on the ground and rising again, so that they are easily captured with a net. They make shallow burrows on the roadside in which they place flies, which they capture with their powerful jaws.