Several species of the Genus _Spondyliaspis_ belong to this group; all of them form “sugar lerp scales,” often encrusting all the foliage of the young gum trees, and are so abundant that in the Mallee scrub country in Victoria and S. Australia the blacks used to collect and eat it in quantities, and had a regular “manna harvest.” _Cardiaspis artifex_ is a short, reddish yellow insect, the larvae of which form beautiful barred shell-like lerps, marked with red and yellow to look like delicate fretwork, upon the leaves of _Eucalyptus robusta_. _C. tetrix_ is a pretty pink and grey species found in the Adelong district, N.S.W. The larva constructs a most remarkable cage of fine red bars, not unlike a lady’s hair net, beneath which the larva crawls about freely like a bird in a cage. _Rhinocola corniculata_ often covers the leaves of different eucalypts with its elongate, opaque, horny, yellow lerps. The test is not unlike that of a large _Mytilaspis_ scale, but is open at the broad end through which the little larva can creep in and out. It ranges from New South Wales to Western Australia. _R. eucalypti_ is a very tiny, little, dark brown psylla, the larvae of which cluster at the tips of the foliage of young blue gums (_Eucalyptus globulus_), and cover themselves with threads of white flocculent matter. It was described by Maskell from New Zealand, but is common both in Tasmania and Australia: it has also been introduced into Africa on the same eucalypt. The larvae of the Genus _Thea_ are curious, broad, flattened creatures, with hard integument. They hide under the dead bark on the trunks of the white stemmed gums, spreading their white woolly secretion around them; the ants look after them, and probably protect them from many enemies in return for the “honey dew,” of which secretion the ants are very fond. _Thea opaca_ is of a general reddish pink colour mottled with brown and black; the wings are transparent, with a dark stigma on the fore wing.