Thorax much dilated behind, depressed and rounded at the end; the side deeply sinuated behind; head pointed, antennae long; of a yellowish orange; antennae with a few greenish rings, cheek below the eye with a greenish line, head above with a longitudinal greenish line. Thorax with a slight keel down the middle, wrinkled behind of a dusky blueish green, a large patch of an orange colour on each side in front, and a small spot of the same colour on each edge of the produced part at base; elytra orange with numerous black spots, and black at the tip, lower wings pale orange at the base, clouded with black at the tip; abdomen orange, slightly ringed with green; legs orange, with three greenish spots on the outside of the femora of hind legs. Length 1 inch 9 lines. Hab. Australia. CHRYSOPA MACULIPENNIS, pl. 4. fig. 2. Head red, with a black spot on the crown; antennae short brownish black; thorax hairy; thorax, abdomen, and legs, brownish black. Wings brown, with iridescent hues, the upper with transverse yellowish lines and spots at the base; a long yellowish line parallel to the outer edge at the end, and emitting a whitish spot which reaches the edge, three spots on the apical portion, the two on the outer edge large; basal half lower wings pale, some of the areolets yellowish; a few clouded with brown, tip of the wing yellowish. Expanse of wings 1 inch 4 1/2 lines. Hab. Australia. EURYBRACHYS LAETA, pl. 4, fig. 3. Head thorax and upper wings of a rich brown colour, the outer edge of the last is deep black, with a transverse yellowish spot just before the middle, the remainder of the edge slightly spotted with black, upper side covered with short blackish hairs; lower wings deep black; abdomen of a bright red, with a round white tuft on the upper side near the end; first two pairs of legs of a deep brown, with some reddish lines; hind legs ferruginous with blackish spines. Expanse of wings 7 lines. Hab. Australia. TETTIGARCTA, n. genus, WHITE. Fam. CICADIDAE. Head very small in front, blunt; lateral ocelli close to the eyes, space between them with long hairs. Prothorax very large, extending back in a rounded form beyond the base of hind wings, the sides sharp pointed, the back very convex and wrinkled. Body and under parts densely clothed with hair. This very singular genus differs from all the Stridulantes in the size and shape of the prothorax; in the neuration of the elytra it is allied to PLATYPLEURA (Amyst and Serville) in the size of head and hairiness of body it approaches CARINETA of the same authors. The Pupa, (fig. 5.) differs in the form of fore legs from those of the other Cicada. TETTIGARCTA TOMENTOSA, pl. 4, fig. 4, and 5 its pupa.