The Family PLUTELLIDAE contains one very destructive little pest in the Diamond-backed Cabbage Moth, _Plutella cruciferarum_; the slender green larvae gnaw holes in the leaves and pupate in net-like cocoons on the foliage. It has a world-wide range and is very common in Australia. The Family TINEIDAE, containing the clothes moths, is defined by Meyrick (Proc. Linn. Soc. N.S.W. 1892) as the rough-headed _Tineina_, with the palpi strongly developed in front of the head, and the hind wings usually as broad as the fore wings, sometimes narrower but seldom broader. Larva with 16 legs, or legs wanting. The Genus _Xystmatodoma_ contains 29 species, of which _X. guildingi_ is a typical form described by Scott in his “Australian Lepidoptera”; it is a slender-winged dull brown moth, the larva of which crawls about in a stout silken sack like that of an immature case moth, and feeds upon low scrub. _Scardia australasialla_ is a handsome little moth, which is figured in Donovan’s “Insects of New Holland”; it measures about 1¼ inches across the wings; the fore pair are dull brown but so thickly covered with shining white to pale yellow spots that it looks very brilliant; the hind pair are brown fringed with long plumes. _Blabophanes ethelella_ is about ¾ of an inch across the wings; the fore pair are dark brown finely spotted with white and some have a comparatively large white dot in the centre of each wing, the hind margin also edged with white; the hind pair light brown. The Genus _Tinea_ is represented by a number of both native and introduced species. The common clothes moth, _Tinea pellionella_, is too well known to need description; it is world-wide in its range, and lays its eggs upon clothes on which the larvae feed and finally use particles to construct their cocoons. _T. tapetzella_ feeds among furs and skins. _Tineola biselliella_ is a third cosmopolitan species of clothes moth. _Tinea fuscipunctella_ feeds upon dried animal matter, refuse and such like; it also is world wide in its range. Among our native species, _T. nectaria_ is under ½ an inch across the wings; the fore pair have the basal two thirds silvery yellow with the tips black; the hind pair dull yellow darkest at the tips. Meyrick says that these larvae make cases out of eucalyptus leaves, but my specimens were bred out of blister-like excrescences or galls upon the leaves of a shrub in the Botanic Gardens Sydney. _Thudaca obliquella_, about 1 inch across the wings, is a beautiful little silvery white moth, with the fore wings deep yellow thickly marked with parallel and transverse bars of silvery white; the hind pair broad, silvery, lightly clouded, and fringed behind with long plumes.