Adult female yellowish-brown, filling the test. Antennæ of six joints, of which both the second and third seem sometimes double. Foot normal; upper digitules long fine hairs, lower pair broad. The spiracular spines are strong and conspicuous. The skin is divided into segments corresponding with those of the test, the divisions being marked by lines of spinneret orifices which are small and simple. In the second stage the usual wavy edge of the genus is not generally apparent. Adult male somewhat thick and short. Antennæ of nine joints, the first short and thick, the remainder long and nearly equal; each joint after the first has many nodosities, from which spring longish hairs. Foot long and slender, especially the tibia. Digitules fine hairs. Thoracic band inconspicuous. Abdominal spike short and blunt. This species is usually accompanied by a great quantity of very black fungus covering and rendering unsightly the whole plant on which it lives. Habitat--On _Hymenanthera crassifolia_, Evans Bay, Wellington. This insect seems to be intermediate between _C. piperis_ and _C. depressus_, differing from both in the rugose female test and the distribution of the spinneret orifices. 37. Ctenochiton perforatus, Maskell. N.Z. Trans., Vol. XI., 1878, p. 280; Vol. XVI., 1883, p. 130. (Plate VIII., Fig. 2.) Test of adult female white, waxy, circular, nearly flat, brittle, thin except at the edge. Fringe thin, segments broadly triangular. Diameter nearly 1/6in. The test is divided by narrow lines of minute spots, corresponding to the spinneret orifices of the insect, into rows of pentagonal or hexagonal segments. The interior segments are only dotted, but the exterior row exhibits curvilinear series of small perforations or air-cells arranged in slightly radiating rows, which extend also to the corresponding segments of the fringe. The test of the second stage of the female is very thin and filmy, waxy, flat, slightly elongated; the fringe as in the adult; but there are no perforations or air-cells. Length, about 1/14in. Test of male waxy, thin, slightly elongated, rather convex; length, about 1/15in. Fringe and air-cells as in the female test. At the abdominal end is a joint or hinge separating the last segment. Adult female filling the test, shrivelling at gestation; colour greyish or greenish-white. General appearance somewhat leathery. Rows of minute oval spinnerets run round the edge and across the body, corresponding with the divisions of the test. Antennæ of six joints, the third joint being the longest, and seeming double on account of the depressed ring: on the last joint some hairs. Feet normal, with somewhat thick coxæ and femora: upper digitules long; lower pair narrow. Anal ring with eight hairs. A row of scattered small hairs runs round the edge of the body. Female of second stage very thin and transparent, seeming like a bluish-green film. The wavy edge is conspicuous. Antennæ of six joints.