_Exoneura froggatti_ is a little bee not much over ¼ of an inch in length, black with smoky rings, reddish legs and a curiously sack-shaped reddish brown abdomen, broadest near the apex, but contracted to a point at the tip. I have frequently cut them out of small burrows in the dead stems of wattle trees. _Exoneura bicolor_ is a slightly larger species, with a darker, broader abdomen, and it comes from Queensland. Cockerell has added three more new species, all from the neighbourhood of Sydney. The great Carpenter Bees of the Genus _Xylocopa_ are represented by four species, which are more common in Queensland and the northern parts of Australia; but one species at least, _Xylocopa aestuans_, ranges southwards. It is of the typical broad form with dark coloured wings; the upper surface of the thorax is clothed with yellow, other portions with black hairs. _Xylocopa bryorum_ is a larger species measuring about 1 inch in length, with a wing expanse of nearly two; the whole of the upper surface is thickly clothed with golden yellow hairs, the brown beneath giving it a greenish tint. The wings are light brown with black nervures, and the hairs on the legs and under-surface are dark brown to black. The closely allied Carpenter Bees of the Genus _Lestis_ are peculiar to Australia. The male of _Lestis bombylans_ measures over ½ an inch in length, and is of a rich metallic green, with the front of the face striped with white; the thorax and base of abdomen are clothed with golden hairs, those on the front of the thorax forming a double bar; the hairs on the front pair of legs yellow, those on the hind pair black; the wings are brown with faint iridescence. The female has the face silvery, but no yellow down upon the thorax; the abdomen is deep purple; and the wings almost opaque, varying from dark brown to rich metallic violet colour in different lights. The second species, _Lestis aerata_, is slightly larger, with the stripe on the face of the male yellow, and all the legs fringed with yellow pubescence, while the female is of a uniform brassy green, with wings light coloured, more like those of the males, and only showing a slight iridescence. Both species have a wide range; those about Sydney form their nests in the dead flower stalks of the grass trees (_Xanthorrhoea_). It begins by boring a circular hole 3½ lines in diameter towards the centre, then turns downward, excavating all the pith to a depth of about 4 inches, and then works out about the same distance above the opening, so that the full length of the chamber is 8 inches, with an average of ½ an inch in diameter. This is divided off into a row of cells, each about ½ an inch in length, with a ball of bee bread and an egg deposited in the far end; each cell is separated by a stout wad of triturated pith. I have never found the centre of the chamber in front of the opening closed up with cells, a space always being left unoccupied on both sides.