Adult male yellowish. Antennæ nine-jointed, every joint except the first bearing several hairs. Feet normal; upper digitules not long, lower pair fine hairs. Thoracic band conspicuous and long. Abdominal spike short. Habitat--On _Pittosporum eugenioide_, _P. tenuifolium_, _Panax arboreum_, _Coprosma lucida_, _Rubus_, &c., Riccarton Bush, Christchurch; Nelson; Dunedin; Wellington. 38. Ctenochiton piperis, Maskell. N.Z. Trans., Vol. XIV., 1881, p. 218; Vol. XVII., 1884, p. 25. (Plate VIII., Fig. 3.) Test of adult female circular, convex, regularly tessellated in hexagonal segments; fringe not very regular, sometimes almost or quite absent; waxy, somewhat thick; diameter, about 1/15in. Colour variable; outer parts white, yellow, or greenish-white, central segments purplish. Test of second stage of female waxy, very thin, flat, with fringe of broadly triangular segments: no air-cells. Length, about 1/30in. Test of male elongated, convex, glassy, segmented. Length, about 1/20in. Slightly coloured like that of the female. Adult female filling the test. Colour corresponding with that of the test. At gestation the under-side becomes hollow, and the young are sheltered beneath it for awhile. Antennæ seven-jointed; on the last joint several hairs. Feet normal; lower digitules rather broad. Round the dorsal surface, half-way between the centre and the edge, is a row of swellings[O] or tubercles. [O] Possibly spiracular. Female of second stage elongated, the cephalic portion narrower than the abdomen; flat, thin; edge wavy; stigmatic spines rather stout; a few small spines on the edge. Antennæ six-jointed; feet normal. Young insect of normal form, but with numerous minute wrinkles on the edge of the body. Adult male greenish-yellow; antennæ nine-jointed. Foot normal, with somewhat thick tarsus. Penis ending in a round, somewhat large knob. Habitat--On _Piper excelsum_ (kawakawa); Auckland, Hawke's Bay, Wellington. The regularly-circular form and coloured segments of the female test, and the tubercles of the dorsum, distinguish this species. 39. Ctenochiton viridis, Maskell. N.Z. Trans., Vol. XI., 1878, p. 211; Vol. XVII., 1884, p. 24. (Plate IX., Fig. 1.) Test of adult female absent or fragmentary; very thin, waxy, white, divided into pentagonal or hexagonal segments, each of which exhibits numerous concentric wavy curves, crossed by straight lines radiating from the centre;[P] the segments are separated by double lines of minute spots, corresponding to the spinneret orifices of the insect. No air-cells. Fringe seldom visible. [P] The radiating lines and concentric curves of these segments are usually somewhat conspicuous, at least on the adult female, and serve to distinguish the test from that of _C. elongatus_, which otherwise resembles it.