Macleay’s wood moth, _Zeuzera macleayi_, said to be identical with Herrick-Schafer’s _Eudoxula boisduvalli_, has a large cylindrical body, and is the giant of the family, measuring up to 10 inches across the wings. They are brown thickly mottled with grey scales; when taken they are generally found clinging to the tree trunks, upon which each female deposits many thousands of small shot-like eggs. Olliff has given a detailed description of _Leto staceyi_, and an account of a variety (Pro. Linn. Soc. N.S.W. 1887). In a general account of these wood-moths (Pro. Linn. Soc. N.S.W. 1894) I recorded a number of Thornton’s observations. Family 8. Bag Moths. PSYCHIDAE. The members of this group are more remarkable in the caterpillar than in the moth stage, for as soon as they emerge the larvae construct protective caps of silken threads and bits of their food-plant, which as they increase in size become regular silken sacks open at the neck, through which the head and fore-legs protrude as they crawl about, but retract at the least alarm. They take their popular name of “Bag” or “Case Moths” from this peculiar habit, and the different species construct different forms of bags and ornament them with sticks or leaves. In Germany they are called “Sacktragers”; in America are known as “Basket Worms”; and the family is fairly represented all over the world. This country is rich in large species, some of which were noticed as curiosities at a very early date, and Westwood described and figured most of our bag moths (Proc. Zool. Soc. 1854) under the Genus _Oiketicus_: McCoy in his “Podromus of Natural History of Victoria” Decade iv. gave additional notes on the habits of two of our common species; and an interesting paper on how they construct their portable homes will be found in the “Victorian Naturalist” by Hill (1898). The caterpillars themselves are short, naked, dull green creatures with stout horny heads, and are apparently so well protected from their many enemies that one would hardly expect to find them suffer from the attacks of parasites. But they must have some weak point in their armour for a very large percentage, even when collected and kept in breeding cages, produce only wasp and fly parasites. When full grown the caterpillar closes up the neck of its bag and fastens it by a stout silken band to a twig before changing into the chrysalid state; but while the male turns round and pupates head downward, the female remains head up as before, and when she casts her pupal skin is an aborted wingless creature, with small head and legs; the body simply develops into a great swollen sack of eggs, which hatch out in her body, or in the shelter of the cocoon; and the larvae make their way out at the open tip of the bag, each attached to a silken thread, a squirming mass of hundreds of little black creatures, leaving her only a shrivelled skin in the cocoon. The male moth, which is rare, is a