The MICTINAE are represented by one of our best known species, which I called the “Crusader Bug,” _Mictis profana_. It is a somewhat variable elongate insect just under an inch in length, of a uniform dull drab-brown, with the inner edge of each elytron marked with a dull yellow stripe, which, intersecting each other in the centre, produce a distinct cross on the back. The hind legs are thickened and the apex of the tibia forms a blunt spine. It has a wide range over Australia, and of late years has been found infesting the citrus orchards, where it punctures the young shoots and causes them to die back. The Genus _Amorbus_ contains 15 described species peculiar to this country, most of which feed upon the foliage of young gum trees and give out a very strong odour when touched; the young larval forms are often brightly coloured, but in the adult state all these bugs are dull brown. _Amorbus angustior_, under ¾ of an inch in length, has the dorsal surface flattened; the abdomen swells out on the sides beyond the edge of the folded elytra, and the whole surface is granulated or roughened. It is of a uniform chocolate colour with the antennae and abdomen rusty red. _A. robustus_ is a much larger species, stout in proportion, with the same elongate form, but the edges of the abdomen not projecting beyond the wings. _Mutusca brevicornis_ is a very slender brown bug, about ½ an inch in length, usually found resting among the grass. The head and thorax are elongate, with the former produced in front of the antennae into two slender lobes; the elytra are long and slender, and the wings well adapted for flight. _Riptortus robustus_ is also an elongate bug, but shorter and stouter, with the head short and angular; the thorax is short, rounded in front, and produced into a ridge behind, with a stout spine on either side. The body is long, constricted in the centre, and rounded at the tip: the thighs of the hind legs long, thickened and armed with a row of spines along the inner edge. The general colour is reddish brown. The Genus _Leptoglossus_ contains some handsome species which are remarkable for having the tibiae of the hind legs dilated into leaf-like processes. _Leptoglossus membranaceus_ is an elongate, flattened, black bug banded with a slender red line across the thorax; the head is small, projecting in front of the triangular thorax; and the shield shaped body comes to a rounded tip. The fore legs are slender, but the hind pair are slightly thickened on the thighs and roughened on the inner edges; and the tibiae have leaf-like projections on either side, giving it a very remarkable appearance. It is common in North Queensland and ranges over Africa, India, Ceylon, and the Philippines. Family 3. Chinch Bugs. LYGAEIDAE.