15. Mytilaspis epiphytidis, Maskell. N.Z. Trans., Vol. XVII., 1884, p. 21. (Plate V., Fig. 2.) Female puparium flat, pyriform, brown in colour, thin; length, about 1/11in. Male puparium narrower than that of the female, and a good deal darker, being sometimes almost black; length, about 1/20in.; not carinated. Adult female dark-grey in colour, elongated, segmented. Abdomen ending in two median lobes; along the edge several deepish curvilinear incisions, between which are some strong spines. Five groups of spinnerets: lower pair with fourteen to sixteen orifices; upper pair, twelve to sixteen; uppermost group, four to six. Adult male unknown. Habitat--On _Astelia cunninghamii_, Wellington. 16. Mytilaspis leptospermi, Maskell. N.Z. Trans., Vol. XIV., 1881, p. 215. (Plate V., Fig. 4.) Female puparium flat, elongated, irregularly pyriform, light-brown in colour; length, about 1/12in. The secretion forming the puparium is mixed with bark-cells of the tree, arranged longitudinally. Male puparium narrower than that of the female, and darker in colour. Adult female greyish-green, elongated, segmented; abdomen ending in six lobes, of which the two median are conspicuous and somewhat large and floriated, the rest very small. Five groups of spinnerets: the upper group with about fifteen openings; the others with from twenty-five to thirty-five. Single spinnerets none, or very few. Adult male unknown. Habitat--On _Leptospermum scoparium_ (manuka), Wellington; Canterbury; Auckland. The puparia are often numerous on the loose scaly bark of the tree. 17. Mytilaspis metrosideri, Maskell. N.Z. Trans., Vol. XII., 1879, p. 293. Female puparium white, pyriform. Female in all stages dark-coloured; in last stage nearly black. General outline resembling _M. drimydis_, but the abdomen is much sharper and more pointed, with a finely-serrated edge, ending in three minute, pointed lobes, joined by a scaly process. Spinnerets in an almost continuous arch, which may be resolved into five groups; seventy or eighty openings; several single spinnerets. The rudimentary antennæ can be made out. The young female has an elongated oval outline, little corrugated. The feet, digitules, antennæ, &c., resemble those of _M. pomorum_. The abdomen is like that of the adult, without the groups of spinnerets. Male unknown, but puparium smaller and rather darker in colour than that of the female. Habitat--On _Metrosideros robusta_ (rata), Wellington, and probably elsewhere. It is not common. 18. Mytilaspis phymatodidis, Maskell. N.Z. Trans., Vol. XII., 1879, p. 292. Female puparium flattish, pyriform, dirty-white or brownish; length, about 1/12in. Male puparium similar, brown.