The Genus _Cystosoma_ was created by Westwood (1842) to contain the great green “Bladder Cicada” which he called _Cystosoma saundersi_, that at one time was common in the orange orchards around Newcastle, N.S.W. Mrs. Ross says it is now common about Armidale, N.S.W., on the sweet brier, and I have also had it on willows from Glen Innes N.S.W. A second much smaller species, with similar opaque green tegmina, _C. schmeltzi_, ranges up the coast of North Queensland. The two curious hairy brown cicadas belonging to the Genus _Tettigarcta_ are restricted in their range. _Tettigarcta tomentosa_, the darkest in tint, has each side of the thorax produced into a distinct spine; it is only found in Tasmania. _T. crinita_ comes from similar country in the Gippsland forests, Victoria; it is not quite so hairy, and has the thorax rounded on the outer margin without any spines. Family 2. Frog-Hoppers. CERCOPIDAE. The members of this family are not very numerous though world-wide in their distribution. They are stout, wedge-shaped, elongate insects of moderate size; the head is furnished with large flattened eyes on the sides; with a few exceptions two ocelli are present on the vertex between the eyes; the small, short antennae, composed of two bead-shaped joints surmounted with a bristle, are placed in front of and between the eyes. The pronotum is large with the triangular scutellum occupying the centre of the back; the tegmina, longer than the body, are coriaceous, reticulate, with two long discoidal and five or more apical cells. The coxae and femora are short; the posterior tibiae are hardly longer than the others, rounded at the base, spatulate at the apex, armed on the outer margins with two stout spurs, the second twice the length of the first; the tibiae and basal joints of the tarsi are terminated with rows of spines. Most of our known species were described by the French naturalists, Amyot & Serville (Annals Soc. Entom. de France 1845); and Walker (Brit. Museum Cat. Homoptera 1851); and but little attention has been paid to them since. Our most characteristic species belong to the Genus _Eurymela_. Seventeen species are listed by Walker from all parts of Australia. They are large, thickset frog-hoppers, with the head broad and truncate in front with the face much inflexed; their general tint is blue-black with the head and elytra marked with red or white bands or spots. They lay their eggs under the bark of young gum trees, slitting it in regular rings with their stout ovipositors and leaving a white papery substance along the punctures. The young cling to the twigs in clusters after they emerge, and they may often be seen in different stages of growth upon the same bush. They are very active little creatures, creeping round the twig when disturbed, and jumping as soon as they are touched. Many of them are much sought after by ants which come to them for the honey dew they secrete.