Female and male puparia similar, or nearly similar, in shape, but the male puparium is smaller. Puparia elongated, generally more or less mussel-shaped or pyriform, usually convex, more or less curved; pellicles at one end. Male puparia not carinated. Five groups of spinnerets in the female, but the groups are sometimes continuous. 13. Mytilaspis cordylinidis, Maskell. N.Z. Trans., Vol. XI., 1878, p. 195. (Plate V., Fig. 1.) Female puparium pure white, elongated, very narrow; usually straight, sometimes curved; pellicles yellow, at one end; length, about 1/8in.; breadth, about 1/30in. Male puparium similar to that of the female, but much smaller; length, about 1/20in. Adult female pale yellow in colour, elongated, distinctly segmented. Rudimentary antennæ on the cephalic segment. A few fine hairs at the edges of the segments. Abdomen ending in two lobes with a small median depression; several serrated scaly hairs, and a few spines. Five groups of spinnerets: uppermost groups, seven or eight orifices; upper lateral group, fourteen to twenty; lower lateral group, twenty to twenty-five. A great number of single spinnerets. Adult male doubtful; very minute and difficult to detect. Antennæ apparently short and tibiæ large. Habitat--On _Cordyline australis_ and _C. indivisa_, _Phormium_, _Gahnia_, _Astelia_, _Eucalyptus_, &c., throughout the islands; but the chief habitat seems to be _C. australis_ (the common cabbage-tree), on which it is often very abundant. This species may at first sight be mistaken for _Fiorinia stricta_, described below, which also infests Cordyline and Phormium; but, on inspection, it will be seen that the puparium of the Mytilaspis is much whiter, and the pellicles yellow, those of _F. stricta_ being black. An examination of the second pellicles of the two species will, of course, at once distinguish them. 14. Mytilaspis drimydis, Maskell. N.Z. Trans., Vol. XI., 1878, p. 196. (Plate V., Fig. 3.) Female puparium elongated, often straight, sometimes curved; colour, dirty-white or brown; pellicles at one end; length, about 1/12in. Male puparium similar, but smaller. Adult female dull-red in colour, elongated, not very distinctly segmented. Abdomen ending in a number of small lobes, of which the four median are the largest; several fine hairs between the lobes; no groups of spinnerets, but a very great number of single ones, which are scattered on the segments as far up as the rostrum. Many of these protrude as short thick tubes with serrated or fringed extremities. On the cephalic segment are a few spiny hairs and two rudimentary antennæ. Adult male red in colour; antennæ of ten joints; tarsi somewhat large. Both antennæ and feet have numerous hairs. Digitules, fine. Habitat--On _Drimys colorata_, Water of Leith, Dunedin, from which it has spread to other native plants.