The DYNASTIDES contain the giants of the family, and in several genera the males have the head and thorax greatly enlarged and produced into blunt spines and horns; while the female has them of the usual rounded form. _Oryctes barbarossa_ is one of our largest black lamellicorns; it comes from N. Australia. _Pentadon australis_ is a shining black beetle about ¾ of an inch in length, which has been found damaging young maize plants about Sydney. The Queensland Elephant Beetle, _Xylotrupes australicus_, in the larval state feeds upon decaying vegetable matter, from which the beetles emerge and climb up the first tree to hand, and upon which they cling during the day, but come buzzing round to the lamps at night. The male measures 2 inches in length; is of a uniform black colour; the head curves out in front into a double-pronged horn; and the front of the thorax is produced into a second swollen one curving downward over the horns on the head, arcuate and toothed on either side of the tip. The female as usual in this group is smaller, and the head and thorax are of the ordinary rounded structure. * * * * * The CETONIDES comprise the beautiful “Rose Chafers,” with their shorter, broader, flattened bodies, small heads, and the angular thorax broadest behind. Australia is rich in these flower-haunting beetles, and some species are very abundant in the summer months. A great number were at one time placed in the Genus _Schizorrhina_, but in 1880 Kraatz in a paper on the revision of the family (Deutsche Ent. Zeit. xxiv.) divided them into a great many new genera, in some cases with very little reason. [Illustration: =Fig. 73.=--_Merimna atrata_ (Lap. et Gory). A Buprestid Beetle that has the curious habit of flying into the fire. (“Agricultural Gazette,” N.S.W.)] The members of the Genus _Lomaptera_ are chiefly found in the more tropical parts of this continent, and are easily distinguished from the other groups by the shape of the thorax, the hind margin produced into an angular wedge into the centre of the elytra; while in the other typical Rose Chafers the thorax is truncate, and a wedge-shaped piece separated from the thorax occupies the centre of the back. _Lomaptera wallacei_ is of the usual flattened form; uniform rich shining green; and measures just an inch in length. It is found upon flowers in the tropical scrubs of North Queensland. _L. duboulayi_, about the same size, is of a duller green tint, with the outer margin of the head, thorax, elytra and under-surface dull yellow: _L. cinnamea_, slightly smaller, is of a uniform shining reddish brown colour.