of a uniform reddish brown colour, with black eyes, and mottled wings; _P. violacea_ is a small bright metallic violet tinted insect not unlike a blue bottle fly, but is easily distinguished when the antennae are examined. The Genus _Tabanus_ contains many of the typical “March Flies”: _Tabanus brevidentatus_ measures ½ an inch in length; is of a uniform grey ash colour, with the hind edges of the abdominal segments barred with light brown. _T. edentulus_ is a slightly larger, darker coloured fly with greyer bands on the body; it is common on the slopes of Mt. Kosciusko. _T. abstersus_ is still larger and darker, but with the same general colour; the head and under-surface are clothed with white hairs; the wings clouded; the base and sides of the abdomen reddish brown with the dorsal surface barred with fine white hairs. _T. sanguinarius_, one of the largest species, is of a uniform reddish brown, with black eyes; the thorax tinted with yellow; and the wings clouded. It has a wide range over Queensland and N.S. Wales. _Silvius angusta_ is like a very small specimen of _Tabanus brevidentatus_. The members of the small Family LEPTIDAE are distinguished from the preceding one, in having the third joint of the antennae simple and furnished with a bristle, and the tibiae spined. The curious looking larvae have the abdomen divided into two points at the tip; they live in pits like the ant-lions. _Leptis aequalis_ is a greyish looking species about the size of a house fly, with the head composed of two large globular eyes touching in the centre; the legs are long; the wings smoky; the elongated abdomen rounded at the tip, and barred with black; the whole insect clothed with scattered hairs standing up thickly on the dorsal surface. These flies are very common flying over aphis infested wheat fields; my specimens come from Molong, N.S. Wales. Family 8. Bee-flies. BOMBYLIDAE. These are popularly known as bee-flies, on account of their remarkable powers of flight, and hairy appearance. They are all more or less clothed with delicate downy hairs, furnished with 3 jointed antennae, and slender legs terminating in fine claws.