The Genus _Symphyletes_ contains a number of large and handsome longicorns that are found clinging to twigs and branchlets; many of them in the larval state burrow in the stems of wattles, gum trees and other smaller shrubs. _Symphyletes neglectus_ is an elongate dull brown beetle about 1 inch in length; it girdles the branches of _Acacia longifolia_, laying its eggs under the bark of the dying portion in which the little grub feeds in the early part of its life. _S. nigrovirens_ is a much smaller beetle, with the head, thorax, and base of the elytra clothed with dull yellow hairs; the rest of the wing covers is deep green striped with white on the sides. It feeds upon a number of small shrubs, but its commonest food plant is the stunted prickly wattle (_Acacia juniperina_). _S. solandri_, a larger beetle clothed with a dense coat of fine buff hairs, breeds in the flower stalk of the grass tree, often cutting it right through and causing the upper half, beneath which it pupates, to fall off. _S. vestigialis_ measures ¾ of an inch; it is brown, richly mottled with buff and grey. It feeds upon wattles; it has a wide range over Southern Australia. [Illustration: =Fig. 95.=--_Hebecerus marginicollis_ (Boisd.). The White-cheeked Longicorn. (“Agricultural Gazette,” N.S.W.)] The Genus _Penthea_ comprises a number of more thickset beetles with similar habits, and which have the upper surface of the thorax and wing covers granulated or ribbed and these are either covered with a dense pubescence or mottled all over in a very characteristic manner. _Penthea vermicularia_, one of the commonest and with a very wide range, is black with the antennae banded, and the elytra covered with irregular wavy white markings. It is very variable in size, 1¼ inches to under ¾ of an inch in length. _P. saundersi_, found in W. Australia, is much larger, of a more shining dark chocolate brown tint, and more deeply impressed with well defined spots, blotches and irregular buff coloured markings. _P. sannio_, smaller than the last and with a more constricted thorax, has the whole of the upper surface clothed with a creamy grey pubescence overlaid with deep orange red, and irregular dark lines crossing the wing covers; this beautiful beetle is a native of Queensland. _Rhytiphora argus_ takes its name from the dark brown eye-like spots all over its back showing through the rich buff pubescence; it also ranges over a large part of Queensland. _Depsages granulosa_ resembles a _Penthea_ in its robust form; it measures over 1½ inches in length; is of a uniform dark dull brown tint, with the elytra covered with fine granules or bosses. It is common about Sydney, found clinging in summer time to the stems of gum saplings. _Zygrita diva_ is a handsome little dark orange yellow coloured beetle irregularly marked and mottled with black. It is very common upon grass stalks in the open forest country of North Australia.