_O. kershawi_ has the head armed with a similar horn but without the side ones on the thorax; the central ones are longer and more slender than those on the process of the previous species. _O. cuniculus_, one of our commonest species, is only about ¼ inch long; the head and thorax are bright metallic green; the central portion of the latter is produced (in the male) into a conical point; the wing covers are shining black and rugose. Another common species, _O. granulatus_, is slightly smaller; it has the dorsal surface flattened; the head and thorax dull metallic blue; and the wing covers are mottled, light chocolate brown and finely granulated; the whole insect is covered with short reddish hairs, lightest on the dorsal surface. _O. rufosignatus_, which I once took in numbers busily engaged burying a dead wallaby in N.W. Australia, is slightly over ¼ inch in length; it is black with the centre of the thorax and sides of the elytra richly blotched with red. The members of the Genus _Bolboceras_ are even more remarkable in regard to the peculiar forms into which the head and thorax are produced in many species; most of them are reddish brown, and thickly clothed with coarse reddish hairs on the under surface. In structure they are somewhat similar to the former species. They are commonly taken at night flying to the lamp or camp fire. _Bolboceras sloanei_ is a broad hemispherical beetle, just under 1 inch in length; the male has a great horn standing up in the middle of the head, and a shorter one on either side of the thorax, with an excavation above and below them; the female is about the same size without any appendages, and the front of the thorax is hollowed out and the hind portion very rugose. _B. proboscidium_ is common in the southern districts; it is smaller than the last species; of a darker reddish tint. The male has the front of the head produced into a lance-shaped process, standing out straight; this tapers toward the tip, which turns down like a hook, and has a short blunt spine on the upper surface. The female has a small truncate head, quite unlike the male. About 30 species were described in Masters’ Catalogue; Blackburn in his Monograph of the group lists 43 species (Proc. Linn. Soc. N.S.W. 1904). [Illustration: =Fig. 66.=--_Phyllotocus macleayi_ (Fischer). The Honey Beetle, common on flowers in summer time. (“Agricultural Gazette,” N.S.W.)]